Okla. Stat. tit. 62, § 62-449: Cancellation and reduction of taxes by county treasurer

It shall be the duty of the county treasurer upon his being

presented with a properly certified copy of such resolution to

cancel and vacate all unpaid levies and taxes to the extent provided

for in such resolution and to reduce the rate of levy and the amount

of taxes due and unpaid upon all real and personal property and

property of utilities within such municipal subdivision for all

previous fiscal years to the extent provided for in such resolution

and to enter such reduction upon the tax rolls of said county and to

give due credit to such reduction in the collection of all such

taxes.