31 CFR §352.13

1. (a)Federal Reserve Banks and Branches, referred to below, as fiscal agents of the United States, are authorized to perform such services as may be requested of them by the Secretary of the Treasury, or his or her delegate, in connection with the issue, servicing, and redemption of Series HH bonds.
2. (b)
   1. (1)The following Federal Reserve Offices have been designated to provide savings bond services:
   2. (2)Until March 1, 1996, other Federal Reserve Offices may continue to provide some savings bond services, but such services will be phased out over the period prior to that date.