Okla. Stat. tit. 19, § 19-351.3: Agreements with corporate fire department in

unincorporated area or rural fire protection district for fire

protection services.

The board of county commissioners of each county may enter into

agreements with any nonprofit volunteer or full-time fire department

organized pursuant to Section 592 of Title 18 of the Oklahoma

Statutes or any rural fire protection district created pursuant to

the provisions of Sections 901.1 through 901.29 of this title for

the furnishing of fire protection services by such entities for all

persons and property located in the unincorporated areas of the

county. The board of county commissioners of each county may pay

for such fire protection services on such equitable basis as may be

agreed upon and the costs of such fire protection services may be

paid out of the county general fund or the county highway fund.