Okla. Stat. tit. 19, § 19-1505.2: Exception to purchasing procedures for public trusts

The procedures specified in Sections 1500 through 1505 of this

title shall not apply to the receipt of or the purchases, lease-

purchases and rentals of supplies, materials, equipment and

improvements made with funds of a public trust expended by a county

on behalf of such public trust, if the county is a beneficiary of

such public trust and such public trust receives and administers the

proceeds of sales tax.