No funds appropriated for the purpose of implementing the pay increase provided in Section 1 of this act¹ shall be expended by any employing public agency, board, commission or other public employing entity in order to increase compensation for persons employed by a private business entity that has entered into contract with the public employing entity to provide personnel services to the public employing entity in order for the public employing entity to perform duties imposed upon it by law or functions the public employing entity is authorized to perform by law. The provisions of this section shall not be construed to prohibit increases in compensation to a vendor performing other types of services pursuant to a sole source contract or contract awarded pursuant to the Oklahoma Central Purchasing Act.²