Section 168, R.S. §5160, authorized associations to take up bonds upon returning circulating notes to Comptroller of the Currency.

Section 169, R.S. §5161, related to exchange of United States coupon bonds for registered bonds.

Section 170, R.S. §5162; Aug. 23, 1935, ch. 614, §313, 49 Stat. 711, related to manner of making transfers of bonds.

Section 171, R.S. §5163, related to establishment of registry of transferred bonds by Comptroller of the Currency.

Section 172, R.S. §5164, required Comptroller of the Currency to notify national banking associations of transfers from its accounts.

Section 173, R.S. §5165, related to examination of registry and bonds by Comptroller of the Currency and Treasurer of United States.

Section 174, R.S. §5166, related to annual examination of bonds by national banking associations.

Section 175, R.S. §5167, related to custody of bonds and collection of interest.

Section 176, acts June 20, 1874, ch. 343, §4, 18 Stat. 124; June 21, 1917, ch. 32, §9, 40 Stat. 239, provided that associations desiring to withdraw circulating notes could, upon deposit of money with Treasurer of United States, withdraw bonds on deposit with Treasurer for security of such notes.

Section 177, acts July 12, 1882, ch. 290, §8, 22 Stat. 164; Mar. 14, 1900, ch. 41, §12, 31 Stat. 49; June 21, 1917, ch. 32, §9, 40 Stat. 239, related to amount of bonds banks were required to keep on deposit with Treasurer of United States, as security for circulating notes, and authorized banks having deposits in excess of such amount to reduce, or retire in full, their circulation by depositing lawful money.