Okla. Stat. tit. 36, § 36-1607: United States government obligations

An insurer may invest any of its funds in:

1. Bonds or other evidences of indebtedness of the United

States of America or of any of its agencies or instrumentalities

when such obligations are guaranteed as to principal and interest by

the United States of America or any agency or instrumentality

thereof.

2. Bonds or other evidences of indebtedness which are

guaranteed as to principal and interest by the United States of

America or by any agency or instrumentality of the United States of

America.

3. Bonds, debentures or other securities of the following

agencies of the government of the United States, whether or not such

obligations are quaranteed by such government:

(a) Commodity credit corporation.

(b) Federal national mortgage association and stock thereof when

acquired in connection with sale of mortgage loans to such

association.

(c) Federal land banks, issued under provisions of the Act of

Congress entitled the "Federal Farm Loan Act" and approved July 17,

1916, and any acts amendatory or supplementary to that Act.

(d) Any federal home loan bank, issued under provisions of the

Act of Congress entitled "Federal Home Loan Bank Act" and approved

July 22, 1932.

(e) The Home Owners' Loan Corporation, created by the Act of

Congress entitled "Home Owners' Loan Act of 1933" and approved June

13, 1933.

(f) Federal intermediate credit banks, created by the Act of

Congress entitled "Agricultural Credits Act of March 4, 1923."

(g) Central bank for cooperatives and regional banks for

cooperatives organized under the Farm Credit Act of 1933, or by any

of such banks.

(h) Any other similar agency of the government of the United

States and of similar financial quality.