Invoices against the city shall be made and processed as provided by Oklahoma statutes, 1991, Title 11, Sections 17-102 through 17-104, and Title 62, sections 310.1 - 310.1(b).
1. 
On every invoice submitted to the state or any county or local subdivision of the state, for payment to an architect, contractor, engineer or supplier of material of $2,000 or more, shall be the following signed and notarized statement:
STATE OF OKLAHOMA)
COUNTY OF)
The undersigned (architect, contractor, supplier, or engineer) of lawful age, being first duly sworn on oath, says that this invoice or claim is true and correct. Affiant further states that the (work, services or materials) as shown by this invoice or claim have been (completed or supplied) in accordance with the plans, specification, orders, or requests furnished the Affiant. Affiant further states that (s)he has made no payment directly or indirectly to any elected official, officer or employee of the State of Oklahoma, any county or local subdivision of the state, of money or any other thing of value to obtain payment.
(Architect, Contractor, Supplier or Engineer)
Subscribed and sworn to before me this _____ day of __________, 20_____.
(Notary Public for Clerk or Judge)
2. 
The above section shall not apply to monthly billings submitted to the state for public utility companies or telephone companies, whose services are regulated by the Oklahoma Corporation Commission, but will apply to said utility companies or telephone companies for billing pertaining to installations or changes in service.