[Federal Register Volume 63, Number 201 (Monday, October 19, 1998)]
[Proposed Rules]
[Pages 55832-55838]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-27917]


=======================================================================
-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

National Highway Traffic Safety Administration

49 CFR Part 574

[Docket No. NHTSA-98-4550]
RIN 2127-AH10


Tire Identification and Recordkeeping

AGENCY: National Highway Traffic Safety Administration (NHTSA), 
Department of Transportation (DOT).

ACTION: Notice of proposed rulemaking.

-----------------------------------------------------------------------

SUMMARY: The tire identification and recordkeeping regulation requires 
new tire manufacturers and tire retreaders to label on one sidewall of 
each tire they produce a tire identification number that includes their 
manufacturer's or retreader's identification mark, a tire size symbol, 
an optional descriptive code, and the date of manufacture. The date of 
manufacture is expressed in the last 3 digits of the tire 
identification number.
    In response to petitions for rulemaking submitted by the Rubber 
Manufacturers Association and the European Tyre and Rim Technical 
Organisation, the agency proposes to amend the regulation to require 
the date of manufacture to be shown in four digits instead of the 
currently-required three, and to reduce the minimum size of the digits 
from the current 6 millimeters (mm) (\1/4\ inch) to 4 mm (\5/32\ inch). 
The agency believes that the four-symbol date code would, if adopted, 
permit better traceability of tires during recalls and would allow 
easier identification of older tires. NHTSA also believes that reducing 
the size of the date code from 6 mm to 4 mm would not affect the 
readability of the date code digits. In addition, adoption of these 
proposals would enhance international harmonization by bringing the 
U.S. tire date code requirements into harmony with the new United 
Nations' Economic Commission for Europe (ECE) regulation and the 
International Organization for Standardization (ISO) recommended 
practice.

DATES: Comment closing date: Comments on this notice must be received 
by NHTSA not later than December 18, 1998.
    Proposed effective date: If adopted, the amendments proposed in 
this notice would become effective on or about January 1, 2000. 
Optional early compliance would be permitted on and after the date of 
publication of the final rule in the Federal Register.

ADDRESSES: Comments should refer to the docket number for this rule 
noted above and be submitted to: Docket Management Room, PL-401, 400 
Seventh Street, SW, Washington, DC 20590. Docket room hours are from 10 
a.m. to 5 p.m., Monday through Friday.

FOR FURTHER INFORMATION CONTACT: For technical issues: Mr. Joseph 
Scott, Safety Standards Engineer, Office of Crash Avoidance Standards, 
Vehicle Dynamics Division, National Highway Traffic Safety 
Administration, 400 Seventh Street, SW, Washington, DC 20590; telephone 
(202) 366-8525, fax (202) 493-2739. For legal issues: Mr. Walter Myers, 
Attorney-Advisor, Office of the Chief Counsel, National Highway Traffic 
Safety Administration, 400 Seventh Street, SW, Washington, DC 20590; 
telephone (202) 366-2992, fax (202) 366-3820.

SUPPLEMENTARY INFORMATION:

A. Background

    Section 574.5 of Title 49, Code of Federal Regulations, Tire 
Identification Requirements, sets forth the methods by which new tire 
manufacturers and new tire brand name owners identify tires for use on 
motor vehicles. The section also sets forth the methods by which tire 
retreaders and retreaded tire brand name owners identify tires for use 
on motor vehicles. The purpose of these requirements is to facilitate 
notification to purchasers of defective or nonconforming tires so that 
purchasers can take appropriate action in the interest of motor vehicle 
safety.
    Specifically, Sec. 574.5 requires each new tire manufacturer and 
each tire retreader to mold a tire identification number (TIN) into or 
onto the sidewall of each tire produced, in the manner and location 
specified in the section and as depicted in Figures 1 and 2. The TIN is 
composed of four groups:
    a. The first group of two or three symbols, depending on whether 
the tire is new or retreaded, represents the manufacturer's 
identification mark assigned to such manufacturer by this agency in 
accordance with Sec. 574.6;
    b. The second group of no more than two symbols represents the tire 
size for new tires; for retreaded tires, the second group represents 
the retread matrix in which the tire was processed or if no matrix was 
used, a tire size code;
    c. The third group, consisting of no more than four symbols, may, 
at the option of the manufacturer, be used as a descriptive code for 
identifying significant characteristics of the tire. If the tire is 
produced for a brand name owner, the third grouping must identify such 
brand name owner; and
    d. The fourth group, composed of three symbols, identifies the week 
and year of manufacture. The first two symbols identify the week of the 
year, starting with ``01'' to represent the first full week of the 
calendar year; the third symbol represents the year. For example, 
``218'' represents the 21st week of 1998.
    NHTSA originally proposed these requirements in response to the May 
22, 1970 amendments to the National Traffic and Motor Vehicle Safety 
Act of 1966. 1 Those amendments, among other things, 
required manufacturers and brand name owners of new and retreaded motor 
vehicle tires to maintain records of the names and addresses of the 
first purchasers of tires (other than dealers or distributors) in order 
to facilitate notification to such purchasers in the event tires were 
found to be defective or not to comply with applicable Federal motor 
vehicle safety standards.
---------------------------------------------------------------------------

    \1\ The National Traffic and Motor Vehicle Safety Act of 1966, 
Pub. L. 89-563, was originally codified at 15 U.S.C. 1581, et seq. 
However, it was recodified in 1995 and is now found at 49 U.S.C. 
30101, et seq.
---------------------------------------------------------------------------

    The agency believed that an essential element of an effective 
defect or noncompliance notification system to vehicle or tire 
purchasers was an effective method of tire identification. Accordingly, 
on July 23, 1970, NHTSA published a Notice of Proposed Rulemaking 
(NPRM) (35 FR 11800) proposing to establish a tire identification 
system to provide a means to identify the manufacturer of the tire, the 
date of manufacture, the tire size, and at the option of the 
manufacturer, additional information to further describe the type or 
other significant characteristics of the tire. The agency proposed a 
TIN composed of four groups of symbols: the first group would contain 
the manufacturer's identification mark which would be assigned by 
NHTSA; the second group would identify the tire size by a two symbol 
code; the third group of four symbols would identify the date of 
manufacture of the tire, the first two

[[Page 55833]]

symbols of which would indicate the week, and the last two the year; 
and the fourth group would be the manufacturer's optional description 
of the tire. The symbols would be a minimum of 1/4 inch high and would 
appear on both sidewalls of the tire.
    In a final rule published on November 10, 1970 (35 FR 17257), the 
agency revised the requirements proposed in the NPRM in response to the 
suggestions of various commenters. Specifically, NHTSA reversed the 
order of the manufacturer's optional information and the date of 
manufacture, so that the latter would appear in the fourth grouping and 
the manufacturer's optional information would appear in the third 
grouping. NHTSA also stated that the tire identification number need 
only appear on one sidewall, and that the symbols need only be \5/32\ 
inch high on tires with a bead diameter of less than 13 inches. Many 
commenters requested that the date code be expressed in alpha-numeric 
form in order to reduce the date symbol to two digits. NHTSA declined 
to adopt the alpha-numeric system because it could be confusing to the 
public and because retreaders may not be able to easily determine the 
age of the casing to be retreaded. In order to shorten the stencil 
plate, however, NHTSA dropped one of the two digits representing the 
decade of manufacture, thereby reducing the date of manufacture group 
from four digits to three.

B. The Petitions

    (1) Rubber Manufacturers Association. The Rubber Manufacturers 
Association (RMA) is the primary national trade association for the 
finished rubber products industry in the U.S. RMA petitioned the agency 
to amend 49 CFR 574.5 to permit a 4-digit date code and to reduce the 
size of the lettering from \1/4\ inch to \5/32\ inch.
    RMA explained that at a recent meeting, the ISO Technical Committee 
31 on tires recommended approval of a 4-digit date of manufacture code 
beginning in January 2000. RMA stated that ECE has also authorized the 
use of a 4-digit date code commencing in January 2000. RMA suggested 
that with a 4-digit date code, the first two would represent the week 
and the last two the year. For example, 0100 would mean the first week 
of January of the year 2000. RMA suggested that an appropriate phase-in 
period be allowed during which use of either the 3 or 4 digit code 
would be permitted. In order to avoid having to modify existing molds, 
RMA suggested that the addition of the fourth digit be offset by 
allowing the minimum size of the digits in the date code to be reduced 
to 4 millimeters (mm) (\5/32\ inch), regardless of tire size. Finally, 
RMA stated that such modification would bring these U.S. requirements 
into harmony with the ECE regulation and the ISO recommendation, and 
would allow better traceability and identification of older tires.
    (2) European Tyre and Rim Technical Organisation (ETRTO). Based in 
Brussels, Belgium, the ETRTO is the European standardization authority 
for the establishment and promulgation of interchangeability standards 
for pneumatic tires, rims, and valves. ETRTO submitted a petition for 
rulemaking which cited the ECE regulations and the ISO agreements and 
suggested amending Sec. 574.5 to permit a 4-digit date code effective 
in January 2000. The first two digits would represent the week and the 
latter two would represent the year of manufacture. Again, in order to 
avoid modification of existing tire molds, ETRTO requested reduction of 
the height of the digits from 6 mm (\1/4\ inch) to 4 mm (\5/32\ inch), 
regardless of tire size. ETRTO also sought to justify the requested 
amendments by stating that such amendments would bring U.S. 
requirements into line with the ECE regulations and ISO 
recommendations, and that the amendments would allow better 
traceability of tires and identification of old tires.

C. Discussion

    As stated in the Background discussion above, the TIN originated 
with the May 22, 1970 amendments to the National Traffic and Motor 
Vehicle Safety Act of 1966. Prior to that time, there were no tire 
labeling requirements in effect, other than standard industry 
practices. When considering the TIN in its current form, the agency was 
persuaded by the commenters to the NPRM that economizing on limited 
space on tire sidewalls justified reducing the decade symbol in the 
date code from two digits to one. This presented no problem during the 
1970s since the TIN was new, the lifecycle of tires from manufacture to 
disposal or recycling was shorter then, and the issue of tires 
manufactured in different decades seemed minor at most. The single-
digit year code likewise presented no problem in the 1980s because the 
industry was making the transition from bias-ply to radial tires, and 
the public could easily distinguish between the bias-ply tires of the 
1970s and the new radial tires of the 1980s. No problems appeared in 
this respect until the 1990s. At that time, the single-digit year code 
became inadequate because longer-lived radial tires became widely used 
and there was now no way for the agency or the public to determine for 
certain when the tire was manufactured. When the date code requirement 
was developed in 1970, it was not envisioned that tires manufactured in 
one decade would be taken out of storage and sold ten or more years 
later. That, however, has occurred in some cases.
    Tire manufacturers recognized this as a concern and, in order to 
alleviate that concern without petitioning the government for 
additional rulemaking, the industry's voluntary standards organization 
issued a new recommended practice that provided that tires built in the 
1990s display the symbol ``'' after the TIN to indicate that 
the year of manufacture was in the decade of the 1990s. Not all tire 
manufacturers followed this recommended procedure, however, thereby 
diminishing its meaning and effectiveness. For tires without the mark, 
the public was still left with no way of knowing for certain whether 
the tire(s) they purchased were manufactured in the 1970s, 1980s, or 
1990s.
    The agency does not consider the industry voluntary practice to be 
a satisfactory solution to this problem. Presumably, different symbols 
would be needed to represent different decades. Ultimately, therefore, 
a proliferation of such symbols, and the interpretation problems they 
would present, would further confuse an already confusing situation. 
Rather, NHTSA tentatively concludes that the addition of a fourth digit 
to the date code to specifically identify the decade, as requested by 
the petitioners, would be a simpler and more practical solution.
    NHTSA believes that as run-flat tires and high performance low-
profile tires are developed and become more common, tire diameters will 
increase with consequent decrease in sidewall heights. That means that 
conservation of ever-more limited space on tire sidewalls will become 
even more important than before. The agency's proposal to add a digit 
to the date code that would still fit within the current size of the 
date code, while more clearly identifying the date of manufacture, 
would ensure that the TIN would not take any more space on the tire 
sidewall than before.
    There was some concern within the agency that reducing the digits 
in the date code from 6 mm (\1/4\ inch) to 4 mm (\5/32\ inch) might 
make the numbers too small to be seen easily. To determine whether this 
would be the case, NHTSA

[[Page 55834]]

requested and received from RMA a sample piece of a tire sidewall with 
the numbers 4 mm in height. This sample was examined by various agency 
personnel who indicated that the 4 mm digits were clearly readable. The 
reduction of the size of the digits is so slight as to be barely 
perceptible. Moreover, 4 mm digits are currently permitted with no 
reported difficulties for tires with less than 6 inches cross section 
or with less than a 13-inch bead diameter. Further, NHTSA permits all 
the tire grading information required by the Uniform Tire Quality 
Grading Standards, 49 CFR 575.104, to be expressed in 4 mm letters and 
numbers, again without reported problems with readability. Accordingly, 
NHTSA believes that the tire date code could be reduced from 6 mm to 4 
mm with no effect on the readability of the digits.
    The tire industry's interest in reducing the size of the digits in 
a 4 mm date code is a matter of cost. Based on current requirements, 
the industry has developed date ``plugs'' of a standard size and width 
and that are changed weekly in the tire molds. To avoid the cost of 
modifying current tire molds or constructing new ones to accommodate an 
extra digit the same size as now required, the industry requests that 
it be permitted to reduce the size of the digits. NHTSA tentatively 
concludes that reducing the date code digit size to 4 mm would ensure 
that this rulemaking not result in any cost impacts to tire 
manufacturers, yet a 4-digit date code symbol would be more effective 
in fulfilling the purpose of part 574.
    The agency emphasizes that 4 mm is the minimum size for the date 
code symbols. No maximum size is specified. Tire manufacturers would be 
free to make the digits larger, so long as other required labeling of 
the required size continues to appear on the tire sidewall. Where not 
otherwise specified, tire manufacturers typically adjust the size of 
tire labeling in accordance with trends in the consumer market. NHTSA 
has no reason to believe that manufacturers would do otherwise with the 
size of the date code symbols.
    NHTSA tentatively agrees with the petitioners that the proposed 4-
digit date code would result in better traceability of tires for defect 
and compliance purposes and for more accurate identification of older 
tires for consumers. NHTSA believes that traceability would be improved 
if the year were identified in 2 digits so that the tires produced in 
that week in that year can be more quickly and easily traced to a 
specific production lot. Moreover, requiring the specific year to 
appear in the date code can discourage the unscrupulous practice of 
selling old tires to unsuspecting consumers who think that they are 
buying recently-produced tires. NHTSA has tentatively concluded that 
aging diminishes the wear rates of tires by significant amounts, 
depending on the conditions and length of storage of the tires 
concerned. See Notice of Proposed Rulemaking, Uniform Tire Quality 
Grading Standards, 63 FR 30695, June 5, 1998. Since old tires will not 
provide the wear rates of newer tires, the 4-digit date code will make 
it simpler for prospective tire purchasers to know in advance the 
status of the tires they are purchasing.
    NHTSA is a strong supporter of international harmonization in all 
cases where such harmonization is consistent with its statutory mandate 
to ensure motor vehicle safety. The adoption of the 4-digit date code 
in the TIN is consistent with the agency's harmonization efforts and 
would benefit U. S. tire manufacturers and exporters. The international 
tire industry has become truly global in manufacturing, marketing, and 
sales. In 1995, domestic tire manufacturers exported 22.3 million 
passenger car tires and 3.8 million light truck tires to foreign 
markets. In the same year, the U. S. imported 45 million passenger car 
tires and 5.4 million light truck tires from foreign sources. It is 
apparent, therefore, that maximum harmonization of tire requirements 
would benefit both U. S. and foreign vehicle and tire manufacturers.
    Finally, NHTSA agrees with the petitioners that it would be 
advantageous to permit tire manufacturers to phase in the new 
requirements between the date of publication of the final rule, 
assuming the proposals herein are finally adopted, and the beginning of 
the year 2000. In that interim period, tire manufacturers would be 
permitted to continue to use the currently-required 3-digit date code 
or the new 4-digit date code, at their option. This should give 
manufacturers ample time to make the conversion to the new 
requirements, yet permit them to utilize the new date code as soon as 
they are ready to do so.

Agency Proposal

    Based on the considerations discussed above, NHTSA proposes to 
amend 49 CFR 574.5 as follows:
    a. Change the fourth grouping of the tire identification number, 
which shows the date of manufacture of the tire, from 3 to 4 digits. 
The first two digits would indicate the week of the year, starting with 
the numbers ``01'' to designate the first full week of the year, and 
the last two digits would indicate the year. Thus, the date code symbol 
``2198'' would indicate the 21st week of 1998;
    b. Reduce the minimum size requirement for the digits in the 4-
digit date code, but not the size of the other symbols in the tire 
identification number, from 6 mm (\1/4\ inch) to 4 mm (\5/32\ inch).

Rulemaking Analyses and Notices

a. Executive Order 12866 and DOT Regulatory Policies and Procedures

    This document has not been reviewed under Executive Order 12866, 
Regulatory Planning and Review. 
    NHTSA has analyzed the impact of this rulemaking action and has 
determined that it is not ``significant'' within the meaning of the 
DOT's regulatory policies and procedures. This action proposes to amend 
the tire identification number currently required by 49 CFR 574.5 to be 
marked on all tires sold in the United States. Specifically, this 
proposal would increase the number of digits in the date of manufacture 
group of the tire identification number from 3 to 4, and would permit a 
reduction in the size of those digits so that the 4 digits would fit 
within the same ``plug'' in the tire molds in which the currently-
required 3 digits fit. That would permit tire manufacturers to use the 
same molds that they do now, without having to absorb the costs of 
constructing new molds. Date codes are changed weekly by manufacturers 
and with a sufficient phase-in period, manufacturers would have ample 
opportunity to phase into the new 4-digit date code without having to 
redesign their tire molds. For these reasons, the agency estimates that 
implementation of the proposals herein would not result in any 
increased costs to tire manufacturers, distributors, dealers, or 
consumers. Accordingly, the agency has concluded that preparation of a 
full regulatory evaluation is not warranted.

b. Regulatory Flexibility Act

    NHTSA has considered the effects of this rulemaking action under 
the Regulatory Flexibility Act, 5 U.S.C. 601, et seq. I hereby certify 
that this notice of proposed rulemaking would not have a significant 
impact on a substantial number of small entities.
    The following is the agency's statement providing the factual basis 
for the certification (5 U.S.C. 605(b)). The amendments proposed herein 
would primarily affect manufacturers of motor vehicle tires. The Small 
Business Administration (SBA) regulation at 13 CFR part 121 defines a 
small business

[[Page 55835]]

as a business entity which operates primarily within the United States 
(13 CFR 121.105(a)).
    SBA's size standards are organized according to Standard Industrial 
Classification (SIC) codes. SIC code No. 3711, Motor Vehicles and 
Passenger Car Bodies, prescribes a small business size standard of 
1,000 or fewer employees. SIC code No. 3714, Motor Vehicle Part and 
Accessories, prescribes a small business size standard of 750 or fewer 
employees.
    The amendments proposed in this rulemaking action would merely 
increase the number of digits in the date of manufacture symbol in the 
tire identification number from 3 digits to 4, and permit a reduction 
in the size of those digits from 6 mm (\1/4\ inch) to 4mm (\5/32\ 
inch). The purpose of these changes is to harmonize U.S. requirements 
with those of the European community, to make tires more easily 
traceable in the event of a defect or noncompliance, and to allow 
easier identification of old tires. These proposed amendments were 
requested by the trade organizations that represent the major tire 
manufacturers in both the U.S. and Europe, in particular the reduction 
in size of the digits so that tire manufacturers would be spared the 
expense of designing and making new tire molds. The proposed 
amendments, if adopted, would not impose any increased costs or other 
burdens on tire manufacturers, most if not all of which would not 
qualify as small businesses under SBA guidelines. Neither would the 
proposed amendments result in any increase in costs for small 
businesses or consumers. Accordingly, there would be no significant 
impact on small businesses, small organizations, or small governmental 
units by these amendments. For those reasons, the agency has not 
prepared a preliminary regulatory flexibility analysis.

c. Executive Order No. 12612, Federalism

    NHTSA has analyzed this rulemaking action in accordance with the 
principles and criteria of E.O. 12612 and has determined that this rule 
does not have sufficient federalism implications to warrant the 
preparation of a Federalism Assessment.

d. National Environmental Policy Act

    NHTSA has analyzed this rulemaking action for the purposes of the 
National Environmental Policy Act and has determined that 
implementation of this rulemaking action would not have any significant 
impact on the quality of the human environment.

e. Paperwork Reduction Act

    The provisions of the proposed amendments herein requiring tire 
manufacturers to designate the date of manufacture of their tires in 4 
digits instead of the currently-required 3 and to reduce the size of 
the digits from 6 mm to 4 mm are considered to be third-party 
information collection requirements as defined by the Office of 
Management and Budget (OMB) in 5 CFR part 1320. The proposed amendments 
create no additional information collection requirements since the 
proposals, if adopted, would merely make a slight change to the format 
of existing requirements.
    The information collection requirements for 49 CFR part 574 have 
been submitted to and approved by OMB pursuant to the provisions of the 
Paperwork Reduction Act , 44 U.S.C. 3501, et seq. This collection of 
information authority for tire information and recordkeeping has been 
assigned control number 2127-0503, which expires August 31, 2000.

f. Civil Justice Reform

    The amendments proposed herein would not have any retroactive 
effect. Under 49 U.S.C. 30103(b), whenever a Federal motor vehicle 
safety standard is in effect, a state or political subdivision thereof 
may prescribe or continue in effect a standard applicable to the same 
aspect of performance of a motor vehicle only if the standard is 
identical to the Federal standard.
    However, the United States government, a state or political 
subdivision of a state may prescribe a standard for a motor vehicle or 
motor vehicle equipment obtained for its own use that imposes a higher 
performance requirement than that required by the Federal standard. 
Section 30161 of Title 49, U.S. Code sets forth a procedure for 
judicial review of final rules establishing, amending or revoking 
Federal motor vehicle safety standards. A petition for reconsideration 
or other administrative proceedings is not required before parties may 
file suit in court.

Comments

    Interested persons are invited to submit comments on the amendments 
proposed herein. It is requested but not required that any such 
comments be submitted in duplicate (original and 1 copy).
    Comments must not exceed 15 pages in length (49 CFR 553.21). This 
limitation is intended to encourage commenters to detail their primary 
arguments in concise fashion. Necessary attachments, however, may be 
appended to those comments without regard to the 15-page limit.
    If a commenter wishes to submit certain information under a claim 
of confidentiality, 3 copies of the complete submission, including the 
purportedly confidential business information, should be submitted to 
the Chief Counsel, NHTSA, at the street address noted above, and 1 copy 
from which the purportedly confidential information has been deleted 
should be submitted to Docket Management. A request for confidentiality 
should be accompanied by a cover letter setting forth the information 
called for in 49 CFR part 512, Confidential Business Information.
    All comments received on or before the close of business on the 
comment closing date indicated above for the proposal will be 
considered, and will be available to the public for examination in the 
docket at the above address both before and after the closing date. To 
the extent possible, comments received after the closing date will be 
considered. Comments received too late for consideration in regard to 
the final rule will be considered as suggestions for further rulemaking 
action. Comments on today's proposal will be available for public 
inspection in the docket. NHTSA will continue to file relevant 
information in the docket after the comment closing date, and it is 
recommended that interested persons continue to monitor the docket for 
new material.
    Those persons desiring to be notified upon receipt of their 
comments in the rule docket should enclose a self-addressed stamped 
postcard in the envelope with their comments. Upon receiving the 
comments, the docket supervisor will return the postcard by mail.

List of Subjects in 49 CFR Part 574

    Labeling, Motor vehicle safety, Motor vehicles, Reporting and 
recordkeeping requirements, Rubber and rubber products, Tires.

    In consideration of the foregoing, 49 CFR part 574 would be amended 
as follows:

PART 574--TIRE IDENTIFICATION AND RECORDKEEPING

    1. The authority citation for part 574 would continue to read as 
follows:

    Authority: 49 U.S.C. 322, 30111, 30115, 30117, and 30166; 
delegation of authority at 49 CFR 1.50.

    2. Section 574.5 would be amended by revising paragraph (d) and 
Figures 1 and 2 to read as follows:

[[Page 55836]]

Sec. 574.5  Tire identification requirements.

* * * * *
    (d) Fourth Grouping. The fourth group, consisting of four 
numerical symbols, shall identify the week and year of manufacture. 
The first two symbols shall identify the week of the year by using 
``01'' for the first full calendar week in each year, ``02'' for the 
second full calendar week, and so on. The final week of each year 
may include not more than 6 days of the following year. The third 
and fourth symbols shall identify the year. Example: 3197 means the 
31st week of 1997, or the week of August 3 through 9, 1997; 0198 
means the first full calendar week of 1998, or the week of January 4 
through 10, 1998. The symbols signifying the date of manufacture 
shall be not less than 4 mm (\5/32\ inch) in height and shall 
immediately follow the optional descriptive code (paragraph (c) of 
this section). If no optional descriptive code is used, the symbols 
signifying the date of manufacture shall be placed in the area shown 
in Figures 1 and 2 for the optional descriptive code.
* * * * *

BILLING CODE 4910-59-P

[[Page 55837]]

[GRAPHIC] [TIFF OMITTED] TP19OC98.000



[[Page 55838]]

[GRAPHIC] [TIFF OMITTED] TP19OC98.001



    Issued on October 13, 1998.
L. Robert Shelton,
Associate Administrator for Safety Performance Standards.
[FR Doc. 98-27917 Filed 10-16-98; 8:45 am]
BILLING CODE 4910-59-C