31 C.F.R. § 208.5

Treasury may designate a Financial Agent to establish and administer Treasury-sponsored accounts for individuals for the disbursement of Federal payments, including benefit, retirement, salary, miscellaneous, vendor, expense reimbursement and tax payments. Such accounts may be established upon terms and conditions that the Secretary considers appropriate or necessary and shall be made available at a reasonable cost and with the same consumer protections provided to other account holders at the financial institution. Treasury may deliver payments to such accounts and the maintenance of accounts and the provision of account-related services under this section shall constitute reasonable duties of a Financial Agent of the United States.