Okla. Stat. tit. 19, § 155.5
A. As to the records that are not destroyed as provided for in Section 2 above, the county treasurer in each county in Oklahoma, after compliance with provisions of statute as to microfilming of records, storing original negatives, and providing for convenient viewing of reproductions thereof, is hereby authorized, each year, to destroy the hereinafter mentioned types of work books, reports and records that have been on file or stored in his office for a period of time longer than the period specifically indicated, as follows:
TYPE OF RECORD
REQUISITE TIME OF
RETAINING ORIGINAL Tax Rolls and Tax Roll
adjustments
6 years Tax Sale and Resale Rec-
ords
6 years Special Assessment Rolls 6 years after due date Tax Protest Records Until final settlement Tax Receipts
Real Property, person-
al property
7 years Special Assessments,
emergency or back as-
sessments, and mort-
gage tax receipts
2 years Municipal Bond Records 7 years after final settlement Personal Tax, Warrants
and Records
2 years