CFR > Title 31 - Money and Finance: Treasury > SUBTITLE B—Regulations Relating to Money and Finance > CHAPTER II—FISCAL SERVICE, DEPARTMENT OF THE TREASURY (parts 200 to 391) > SUBCHAPTER A—FINANCIAL MANAGEMENT SERVICE (parts 200 to 285) > PART 203—PAYMENT OF FEDERAL TAXES AND THE TREASURY TAX AND LOAN PROGRAM > SUBPART D—Investment Program and Collateral Security Requirements for TT&L Depositaries (§203.18 to §203.21) > 203.18—Scope of the subpart.

203.18—Scope of the subpart.

This subpart governs the operation of the investment program, including the rules that TT&L depositaries must follow in crediting and debiting TIP main account balances, SDI account balances, and TIO account balances, and pledging collateral security.