Okla. Stat. tit. 52, § 52-99: Filing of papers and documents - Use as evidence

When under any provision of this act or of any order, rule or

regulation made in pursuance of this act, any petition, motion,

return, pleading, report, statement, map or drawing is required to

be filed with the Commission, the same shall be deemed to be filed

when filed with the Secretary of the Commission. Duplicate copies

of all reports, statements, maps or drawings shall also be filed

with the Proration Umpire. The original or any copy of any such

reports, maps, drawings, statements or other documents duly

certified by the Secretary of the Commission, when the contents

thereof are material to the issues involved, shall be competent and

admissible in evidence in any proceedings and hearings therein

brought or had under the provisions of Section One (1) to Thirteen

(13), inclusive, of this act; and any such original or certified

copy thereof shall, in any proceeding upon complaint or prosecution

as for contempt against any person for violation of this act or of

any order, rule or regulation of the Commission, be competent and

admissible in evidence to establish admissions against interest made

by any defendant or defendants to such complaint or prosecution who

filed or caused to be filed such report, map, drawing, statement or

other document.