Okla. Stat. tit. 6, § 6-801: Reserves

A. Member banks of Federal Reserve System. Every state bank

that is a member of the Federal Reserve System shall maintain such

reserves against deposits as may be required by the Federal Reserve

Act, as amended, or by the Board of Governors of the Federal Reserve

System.

B. Banks not members of Federal Reserve System. Every bank

which is not a member of the Federal Reserve System shall maintain

such reserves against deposits as may be required by the Depository

Institutions Deregulation and Monetary Control Act of 1980, as

amended and as prescribed by the Board of Governors of the Federal

Reserve System.

C. Power of Board to change reserve requirement - State

nonmember banks. Whenever the Board shall determine that the

maintenance of sound banking practices or the prevention of

injurious credit expansion or contraction makes such action

advisable, the Board may change from time to time the requirements

as to reserves against demand or time deposits, or both, of banks

which are not members of the Federal Reserve System. Such change

shall not be operative or effective until reasonable notice thereof

has been given to all state banks which are not members of the

Federal Reserve System. Provided, that in no event shall the

reserve requirement be less than that required of a national bank.