[Federal Register Volume 85, Number 242 (Wednesday, December 16, 2020)]
[Notices]
[Pages 81468-81472]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-27641]


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FEDERAL COMMUNICATIONS COMMISSION

[OMB 3060-0004, FRS 17299]


Information Collection Being Submitted for Review and Approval to 
Office of Management and Budget

AGENCY: Federal Communications Commission.

ACTION: Notice and request for comments.

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SUMMARY: As part of its continuing effort to reduce paperwork burdens, 
as required by the Paperwork Reduction Act (PRA) of 1995, the Federal 
Communications Commission (FCC or the Commission) invites the general 
public and other Federal Agencies to take this opportunity to comment 
on the following information collection. Pursuant to the Small Business 
Paperwork Relief Act of 2002, the FCC seeks specific comment on how it 
might ``further reduce the information collection burden for small 
business concerns with fewer than 25 employees.'' The Commission may 
not conduct or sponsor a collection of information unless it displays a 
currently valid Office of Management and Budget (OMB) control number. 
No person shall be subject to any penalty for failing to comply with a 
collection of information subject to the PRA that does not display a 
valid OMB control number.

DATES: Written comments and recommendations for the proposed 
information collection should be submitted on or before January 15, 
2021.

ADDRESSES: Comments should be sent to www.reginfo.gov/public/do/PRAMain. Find this particular information collection by selecting 
``Currently under 30-day Review--Open for Public Comments'' or by using 
the search function. Your comment must be submitted into 
www.reginfo.gov per the above instructions for it to be considered. In 
addition to submitting in www.reginfo.gov also send a copy of your 
comment on the proposed information collection to Nicole Ongele, FCC, 
via email to [email protected] and to [email protected]. Include in the 
comments the OMB control number as shown in the SUPPLEMENTARY 
INFORMATION below.

FOR FURTHER INFORMATION CONTACT: For additional information or copies 
of the information collection, contact Nicole Ongele at (202) 418-2991. 
To view a copy of this information collection request (ICR) submitted 
to OMB: (1) Go to the web page http://www.reginfo.gov/public/do/PRAMain, (2) look for the section of the web page called ``Currently 
Under Review,'' (3) click on the downward-pointing arrow in the 
``Select Agency'' box below the ``Currently Under Review'' heading, (4) 
select ``Federal Communications Commission'' from the list of agencies 
presented in the ``Select Agency'' box, (5) click the ``Submit'' button 
to the right of the ``Select Agency'' box, (6) when the list of FCC 
ICRs currently under review appears, look for the Title of this ICR and 
then click on the ICR Reference Number. A copy of the FCC submission to 
OMB will be displayed.

SUPPLEMENTARY INFORMATION: As part of its continuing effort to reduce 
paperwork burdens, as required by the Paperwork Reduction Act (PRA) of 
1995 (44 U.S.C. 3501-3520), the FCC invited the general public and 
other Federal Agencies to take this opportunity to comment on the 
following information collection. Comments are requested concerning: 
(a) Whether the proposed collection of information is necessary for the 
proper performance of the functions of the Commission, including 
whether the information shall have practical utility; (b) the accuracy 
of the Commission's burden estimates; (c) ways to enhance the quality, 
utility, and clarity of the information collected; and (d) ways to 
minimize the burden of the collection of information on the 
respondents, including the use of automated collection techniques or 
other forms of information technology. Pursuant to the Small Business 
Paperwork Relief Act of 2002, Public Law 107-198, see 44 U.S.C. 
3506(c)(4), the FCC seeks specific comment on how it might ``further 
reduce the information collection burden for small business concerns 
with fewer than 25 employees.''
    OMB Control Number: 3060-0004.
    Title: Sections 1.1307 and 1.1311, Guidelines for Evaluating the 
Environmental Effects of Radiofrequency Exposure.
    Form Number: N/A.
    Type of Review: Revision of a currently approved collection.
    Respondents: Individuals or households, Business or other for-
profit, Not-for-profit institutions, and State, Local or Tribal 
government.
    Number of Respondents and Responses: 335,441 Respondents; 335,441 
Responses.
    Estimated Time per Response: 0.0833 hours (5 minutes)-20 hours.
    Frequency of Response: On occasion reporting requirement and third-
party disclosure requirement.
    Obligation to Respond: Required to obtain or retain benefits. 
Statutory

[[Page 81469]]

authority for this Information collection is contained in 47 U.S.C. 
154(i), 302, 303, 303(r), and 307.
    Total Annual Burden: 41,997 hours.
    Total Annual Costs: $2,933,431.
    Privacy Act Impact Assessment: No impact(s).
    Nature and Extent of Confidentiality: There is a minimal exemption 
from the Freedom of Information Act (FOIA), 5 U.S.C. 552(b)(4), and 47 
CFR 0.459 of the Commission's rules, that is granted for trade secrets 
and privileged or confidential commercial or financial information, 
which may be submitted to the Commission as part of the documentation 
of test results. No other assurances of confidentiality are provided to 
respondents.
    Needs and Uses: The Commission will submit this revised information 
collection to the Office of Management and Budget (OMB) after this 60-
day comment period in order to obtain the full three-year clearance.
    This information collection is a result of responsibility placed on 
the FCC by the National Environmental Policy Act (NEPA) of 1969. NEPA 
requires that each federal agency evaluate the impact of ``major 
actions significantly affecting the quality of the human environment.'' 
It is the FCC's opinion that this is the most efficient and reasonable 
method of complying with NEPA with regard to the environmental issue of 
radiofrequency radiation from FCC-regulated transmitters.
    The December 2019 RF Exposure Second Report and Order, ET Docket 
Nos. 03-137 and 13-184, FCC 19-126, included amendments to rule 
sections 1.1307, 2.1091 and 2.1093 requiring approval by OMB under the 
Paperwork Reduction Act. Revision to information collection effected by 
amendments to rule section 1.1307 is reported herein. Revision to 
information collection effected by amendments to rule sections 2.1091 
and 2.1093 is reported separately under OMB Information Collection 
3060-0057.
    In amendments to rule section 1.1307, the Commission revised its 
implementing rules to reflect modern technology and today's uses. The 
Commission streamlined the criteria for determining when an applicant 
or licensee is exempt from our radio frequency (RF) exposure evaluation 
criteria by replacing service-based exemptions with a formula-based 
approach. For those applicants and licensees who do not qualify for an 
exemption, the Commission provided more flexibility to establish 
compliance with our RF exposure limits. The Commission also specified 
methods that RF equipment operators can use to mitigate the risk of 
excess exposure, both to members of the public and trained workers 
(such as training, supervision, and signage). The amended rules provide 
more efficient, practical, and consistent RF exposure evaluation 
procedures and mitigation measures to help ensure compliance with the 
existing RF exposure limits.
    Most of the changes to rule section 1.1307 represent clarification 
or simplification of existing requirements and are not expected to 
significantly increase or decrease the estimated burden to respondents 
or to the Federal government. To address components of the amended 
requirements that were not included in previous burden estimates, 
isolated revisions were made to the burden estimates as summarized in 
the supporting statement of the Information Collection. To update 
burden estimates based on most recently available data, the Commission 
also adjusted the total number of respondents/responses, the total 
annual hourly burden, and the total annual costs from the previous 
estimates, based on licensing data for calendar year 2019.
    The latest RF exposure Second Report and Order, ET Docket Nos. 03-
137 and 13-184, FCC 19-126, amended rule section 1.1307 by revising 
paragraph (b) to read as follows:

Sec.  1.1307 Actions that may have a significant environmental effect, 
for which Environmental Assessments (EA) must be prepared.
* * * * *
    (b)(1) Requirements. (i) With respect to the limits on human 
exposure to RF provided in Section 1.1310 of this chapter, applicants 
to the Commission for the grant or modification of construction 
permits, licenses or renewals thereof, temporary authorities, equipment 
authorizations, or any other authorizations for radiofrequency sources 
must either:
    (A) Determine that they qualify for an exemption pursuant to 
Section 1.1307(b)(3);
    (B) Prepare an evaluation of the human exposure to RF radiation 
pursuant to Section 1.1310 and include in the application a statement 
confirming compliance with the limits in Section 1.1310; or
    (C) Prepare an Environmental Assessment if those RF sources would 
cause human exposure to levels of RF radiation in excess of the limits 
in Section 1.1310.
    (ii) Compliance with these limits for fixed RF source(s) may be 
accomplished by use of mitigation actions, as provided in Section 
1.1307(b)(4). Upon request by the Commission, the party seeking or 
holding such authorization must submit technical information showing 
the basis for such compliance, either by exemption or evaluation. 
Notwithstanding the preceding requirements, in the event that RF 
sources cause human exposure to levels of RF radiation in excess of the 
limits in Section 1.1310 of this chapter, such RF exposure exemptions 
and evaluations are not deemed sufficient to show that there is no 
significant effect on the quality of the human environment or that the 
RF sources are categorically excluded from environmental processing.
    (2) Definitions. For the purposes of this section, the following 
definitions shall apply.
    Available maximum time-averaged power for an RF source is the 
maximum available RF power (into a matched load) as averaged over a 
time-averaging period;
    Category One is any spatial region that is compliant with the 
general population exposure limit with continuous exposure or source-
based time-averaged exposure;
    Category Two is any spatial region where the general population 
exposure limit is exceeded but that is compliant with the occupational 
exposure limit with continuous exposure;
    Category Three is any spatial region where the occupational 
exposure limit is exceeded but by no more than ten times the limit;
    Category Four is any spatial region where the exposure is more than 
ten times the occupational exposure limit or where there is a 
possibility for serious injury on contact.
    Continuous exposure refers to the maximum time-averaged exposure at 
a given location for an RF source and assumes that exposure may take 
place indefinitely. The exposure limits in Section 1.1310 of this 
chapter are used to establish the spatial regions where mitigation 
measures are necessary assuming continuous exposure as prescribed in 
Section 1.1307(b)(4) of this chapter.
    Effective Radiated Power (ERP) is the product of the maximum 
antenna gain which is the largest far-field power gain relative to a 
dipole in any direction for each transverse polarization component, and 
the maximum delivered time-averaged power which is the largest net 
power delivered or supplied to an antenna as averaged over a time-
averaging period; ERP is summed over two polarizations when present;
    Exemption for (an) RF source(s) is solely from the obligation to 
perform a routine environmental evaluation to demonstrate compliance 
with the RF

[[Page 81470]]

exposure limits in Section 1.1310 of this chapter; it is not exemption 
from the equipment authorization procedures described in Part 2 of this 
chapter, not exemption from general obligations of compliance with the 
RF exposure limits in Section 1.1310 of this chapter, and not exemption 
from determination of whether there is no significant effect on the 
quality of the human environment under Section 1.1306 of this chapter.
    Fixed RF source is one that is physically secured at one location, 
even temporarily, and is not able to be easily moved to another 
location while radiating;
    Mobile device is as defined in Section 2.1091(b) of this chapter;
    Plane-wave equivalent power density is the square of the root-mean-
square (rms) electric field strength divided by the impedance of free 
space (377 ohms).
    Portable device is as defined in Section 2.1093(b) of this chapter;
    Positive access control is mitigation by proactive preclusion of 
unauthorized access to the region surrounding an RF source where the 
continuous exposure limit for the general population is exceeded. 
Examples of such controls include locked doors, ladder cages, or 
effective fences, as well as enforced prohibition of public access to 
external surfaces of buildings. However, it does not include natural 
barriers or other access restrictions that did not require any action 
on the part of the licensee or property management.
    Radiating structure is an unshielded RF current-carrying conductor 
that generates an RF reactive near electric or magnetic field and/or 
radiates an RF electromagnetic wave. It is the component of an RF 
source that transmits, generates, or reradiates an RF fields, such as 
an antenna, aperture, coil, or plate.
    RF source is Commission-regulated equipment that transmits or 
generates RF fields or waves, whether intentionally or unintentionally, 
via one or more radiating structure(s). Multiple RF sources may exist 
in a single device.
    Separation distance (variable R in Table 1) is the minimum distance 
in any direction from any part of a radiating structure and any part of 
the body of a nearby person;
    Source-based time averaging is an average of instantaneous exposure 
over a time-averaging period that is based on an inherent property or 
duty-cycle of a device to ensure compliance with the continuous 
exposure limits;
    Time-averaging period is a time period not to exceed 30 minutes for 
fixed RF sources or a time period inherent from device transmission 
characteristics not to exceed 30 minutes for mobile and portable RF 
sources;
    Transient individual is an untrained person in a location where 
occupational/controlled limits apply, and he or she must be made aware 
of the potential for exposure and be supervised by trained personnel 
pursuant to Section 1.1307(b)(4) of this chapter where use of time 
averaging is required to ensure compliance with the general population 
exposure limits in Section 1.1310 of this chapter.
    (3) Determination of exemption.
    (i) For single RF sources (i.e., any single fixed RF source, mobile 
device, or portable device, as defined in paragraph (b)(2) of this 
section): A single RF source is exempt if:
    (A) The available maximum time-averaged power is no more than 1 mW, 
regardless of separation distance. This exemption may not be used in 
conjunction with other exemption criteria other than those in paragraph 
(b)(3)(ii)(A) of this section. Medical implant devices may only use 
this exemption and that in paragraph (b)(3)(ii)(A);
    (B) Tr the available maximum time-averaged power or effective 
radiated power (ERP), whichever is greater, is less than or equal to 
the threshold Pth (mW) described in the following formula. This method 
shall only be used at separation distances (cm) from 0.5 centimeters to 
40 centimeters and at frequencies from 0.3 GHz to 6 GHz (inclusive). 
Pth is given by:
[GRAPHIC] [TIFF OMITTED] TN16DE20.002

    (C) Or using Table 1 and the minimum separation distance (R in 
meters) from the body of a nearby person for the frequency (f in MHz) 
at which the source operates, the ERP (watts) is no more than the 
calculated value prescribed for that frequency. For the exemption in 
Table 1 to apply, R must be at least [lambda]/2[pi], where [lambda] is 
the free-space operating wavelength in meters. If the ERP of a single 
RF source is not easily obtained, then the available maximum time-
averaged power may be used in lieu of ERP if the physical dimensions of 
the radiating structure(s) do not exceed the electrical length of 
[lambda]/4 or if the antenna gain is less than that of a half-wave 
dipole (1.64 linear value).

   Table 1 to Sec.   1.1307(b)(3)(i)(C)--Single RF Sources Subject to
                    Routine Environmental Evaluation
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        RF source  frequency  (MHz)            Threshold  ERP  (watts)
------------------------------------------------------------------------
0.3-1.34..................................  1,920 R\2\.
1.34-30...................................  3,450 R\2\/f\2\.
30-300....................................  3.83 R\2\.

[[Page 81471]]

 
300-1,500.................................  0.0128 R\2\f.
1,500-100,000.............................  19.2R\2\.
------------------------------------------------------------------------

    (ii) For multiple RF sources. Multiple RF sources are exempt if:
    (A) The available maximum time-averaged power of each source is no 
more than 1 mW and there is a separation distance of two centimeters 
between any portion of a radiating structure operating and the nearest 
portion of any other radiating structure in the same device, except if 
the sum of multiple sources is less than 1 mW during the time-averaging 
period, in which case they may be treated as a single source 
(separation is not required). This exemption may not be used in 
conjunction with other exemption criteria other than those is paragraph 
1.1307(b)(3)(i)(A) of this section. Medical implant devices may only 
use this exemption and that in paragraph 1.1307(b)(3)(i)(A).
    (B) In the case of fixed RF sources operating in the same time-
averaging period, or of multiple mobile or portable RF sources within a 
device operating in the same time averaging period, if the sum of the 
fractional contributions to the applicable thresholds is less than or 
equal to 1 as indicated in the following equation.
[GRAPHIC] [TIFF OMITTED] TN16DE20.003


Where
a = number of fixed, mobile, or portable RF sources claiming 
exemption using paragraph (b)(3)(i)(B) of this section for Pth, 
including existing exempt transmitters and those being added.
b = number of fixed, mobile, or portable RF sources claiming 
exemption using paragraph (b)(3)(i)(C) of this section for Threshold 
ERP, including existing exempt transmitters and those being added.
c = number of existing fixed, mobile, or portable RF sources with 
known evaluation for the specified minimum distance including 
existing evaluated transmitters.
Pi = the available maximum time-averaged power or the ERP, whichever 
is greater, for fixed, mobile, or portable RF source i at a distance 
between 0.5 cm and 40 cm (inclusive).
Pth,i = the exemption threshold power (Pth) according to paragraph 
(b)(3)(i)(B) of this section for fixed, mobile, or portable RF 
source i.
ERPj = the ERP of fixed, mobile, or portable RF source j.
ERPth,j = exemption threshold ERP for fixed, mobile, or portable RF 
source j, at a distance of at least [lambda]/2[pi] according to the 
applicable formula of paragraph (b)(3)(i)(C) of this section.
Evaluatedk = the maximum reported SAR or MPE of fixed, mobile, or 
portable RF source k either in the device or at the transmitter site 
from an existing evaluation at the location of exposure.
Exposure Limitk = either the general population/uncontrolled maximum 
permissible exposure (MPE) or specific absorption rate (SAR) limit 
for each fixed, mobile, or portable RF source k, as applicable from 
Section 1.1310 of this chapter.

    (4) Mitigation. (i) As provided in paragraphs (b)(4)(ii) through 
(vi) of this section, specific mitigation actions are required for 
fixed RF sources to the extent necessary to ensure compliance with our 
exposure limits, including the implementation of an RF safety plan, 
restriction of access to those RF sources, and disclosure of spatial 
regions where exposure limits are exceeded.
    (ii) Category One--INFORMATION: No mitigation actions are required 
when the RF source does not cause continuous or source-based time-
averaged exposure in excess of the general population limit in Section 
1.1310 of this part. Optionally a green ``INFORMATION'' sign may offer 
information to those persons who might be approaching RF sources. This 
optional sign, when used, must include at least the following 
information: Appropriate signal word ``INFORMATION'' and associated 
color (green), an explanation of the safety precautions to be observed 
when closer to the antenna than the information sign, a reminder to 
obey all postings and boundaries (if higher categories are nearby), up-
to-date licensee (or operator) contact information (if higher 
categories are nearby), and a place to get additional information (such 
as a website, if no higher categories are nearby).
    (iii) Category Two--NOTICE: Mitigation actions are required in the 
form of signs and positive access control surrounding the boundary 
where the continuous exposure limit is exceeded for the general 
population, with the appropriate signal word ``NOTICE'' and associated 
color (blue) on the signs. Signs must contain the components discussed 
in paragraph (b)(4)(vi) of this section. Under certain controlled 
conditions, such as on a rooftop with limited access, a sign attached 
directly to the surface of an antenna will be considered sufficient if 
the sign specifies a minimum approach distance and is readable at this 
separation distance and at locations required for compliance with the 
general population exposure limit in Section 1.1310 of this part. 
Appropriate training is required for any occupational personnel with 
access to controlled areas within restrictive barriers where the 
general population exposure limit is exceeded, and transient 
individuals must be supervised by trained occupational personnel upon 
entering any of these areas. Use of time averaging is required for 
transient individuals to ensure compliance with the general population 
exposure limit.
    (iv) Category Three--CAUTION: Signs (with the appropriate signal 
word ``CAUTION'' and associated color (yellow) on the signs), controls, 
or indicators (e.g., chains, railings, contrasting paint, diagrams) are 
required (in addition to the positive access control established for 
Category Two) surrounding the area in which the exposure limit for 
occupational personnel in a controlled environment is exceeded by no 
more than a factor of ten. Signs must contain the components discussed 
in paragraph (b)(4)(vi) of this section. If the boundaries between 
Category Two and Three are such that placement of both Category Two and 
Three signs would be in the same location, then the Category Two sign 
is optional. Under certain controlled conditions, such as on a rooftop 
with limited access, a sign may be attached directly to the surface of 
an antenna within a controlled environment if it specifies the minimum 
approach distance and is readable at this distance and at locations 
required for compliance

[[Page 81472]]

with the occupational exposure limit in Section 1.1310 of this part. If 
signs are not used at the occupational exposure limit boundary, 
controls or indicators (e.g., chains, railings, contrasting paint, 
diagrams, etc.) must designate the boundary where the occupational 
exposure limit is exceeded. Additionally, appropriate training is 
required for any occupational personnel with access to the controlled 
area where the general population exposure limit is exceeded, and 
transient individuals must be supervised by trained personnel upon 
entering any of these areas. Use of time averaging is required for 
transient individuals to ensure compliance with the general population 
exposure limit. Further mitigation by reducing exposure time in accord 
with six-minute time averaging is required for occupational personnel 
in the area in which the occupational exposure limit is exceeded. 
However, proper use of RF personal protective equipment may be 
considered sufficient in lieu of time averaging for occupational 
personnel in the areas in which the occupational exposure limit is 
exceeded. If such procedures or power reduction, and therefore Category 
reduction, are not feasible, then lockout/tagout procedures in 29 CFR 
Section 1910.147 must be followed.
    (v) Category Four--WARNING/DANGER: Where the occupational limit 
could be exceeded by a factor of more than ten, ``WARNING'' signs with 
the associated color (orange), controls, or indicators (e.g., chains, 
railings, contrasting paint, diagrams) are required (in addition to the 
positive access control established for Category Two) surrounding the 
area in which the occupational exposure limit in a controlled 
environment is exceeded by more than a factor of ten Signs must contain 
the components discussed in paragraph (b)(4)(vi) of this section. 
``DANGER'' signs with the associated color (red) are required where 
immediate and serious injury will occur on contact, in addition to 
positive access control, regardless of mitigation actions taken in 
Categories Two or Three. If the boundaries between Category Three and 
Four are such that placement of both Category Three and Four signs 
would be in the same location, then the Category Three sign is 
optional. No access is permitted without Category reduction. If power 
reduction, and therefore Category reduction, is not feasible, then 
lockout/tagout procedures in 29 CFR Section 1910.147 must be followed.
    (vi) RF exposure advisory signs must be viewable and readable from 
the boundary where the applicable exposure limits are exceeded, 
pursuant to 29 CFR Section 1910.145, and include at least the following 
five components:
    (A) Appropriate signal word, associated color {i.e., ``DANGER'' 
(red), ``WARNING'' (orange), ``CAUTION,'' (yellow) ``NOTICE'' 
(blue){time} ;
    (B) RF energy advisory symbol;
    (C) An explanation of the RF source;
    (D) Behavior necessary to comply with the exposure limits; and
    (E) Up-to-date contact information.
    (5) Responsibility for compliance. (i) In general, when the 
exposure limits specified in Section 1.1310 of this part are exceeded 
in an accessible area due to the emissions from multiple fixed RF 
sources, actions necessary to bring the area into compliance or 
preparation of an Environmental Assessment (EA) as specified in Section 
1.1311 of this part are the shared responsibility of all licensees 
whose RF sources produce, at the area in question, levels that exceed 
5% of the applicable exposure limit proportional to power. However, a 
licensee demonstrating that its facility was not the most recently 
modified or newly-constructed facility at the site establishes a 
rebuttable presumption that such licensee should not be liable in an 
enforcement proceeding relating to the period of non-compliance. Field 
strengths must be squared to be proportional to SAR or power density. 
Specifically, these compliance requirements apply if the square of the 
electric or magnetic field strength exposure level applicable to a 
particular RF source exceeds 5% of the square of the electric or 
magnetic field strength limit at the area in question where the levels 
due to multiple fixed RF sources exceed the exposure limit. Site owners 
and managers are expected to allow applicants and licensees to take 
reasonable steps to comply with the requirements contained in paragraph 
1.1307(b)(1) of this section and, where feasible, should encourage co-
location of RF sources and common solutions for controlling access to 
areas where the RF exposure limits contained in Section 1.1310 of this 
part might be exceeded. Applicants and licensees are required to share 
technical information necessary to ensure joint compliance with the 
exposure limits, including informing other licensees at a site in 
question of evaluations indicating possible non-compliance with the 
exposure limits.
    (ii) Applicants for proposed RF sources that would cause non-
compliance with the limits specified in Section 1.1310 at an accessible 
area previously in compliance must submit an EA if emissions from the 
applicant's RF source would produce, at the area in question, levels 
that exceed 5% of the applicable exposure limit. Field strengths must 
be squared if necessary to be proportional to SAR or power density.
    (iii) Renewal applicants whose RF sources would cause non-
compliance with the limits specified in Section 1.1310 at an accessible 
area previously in compliance must submit an EA if emissions from the 
applicant's RF source would produce, at the area in question, levels 
that exceed 5% of the applicable exposure limit. Field strengths must 
be squared if necessary to be proportional to SAR or power density.

Federal Communications Commission.
Marlene Dortch,
Secretary, Office of the Secretary.
[FR Doc. 2020-27641 Filed 12-15-20; 8:45 am]
BILLING CODE 6712-01-P