Okla. Stat. tit. 52, § 52-107: Process - Service - How made - Return

Except as otherwise provided or authorized in this act, service

of any notice, petition or other pleading, citation, summons,

subpoena, order of the Commission of which service is required, and

execution, commitment or other process, in any proceeding before the

Commission under the provision of this act, may be made by the

Proration Umpire, his assistant or any deputy to the Proration

Umpire, or by any other person authorized and directed by order of

the Commission to make such service, and such service may be made

upon any person, firm, trust, association or corporation, required

to be served, in the same manner as is provided for the service of

summons in civil actions in the district courts of the state, upon

such persons, firms, trusts, associations, and corporations

respectively. The officer or other person making any such service

shall make his return thereof and file the same with the Secretary

of the Commission. Said return shall show the time when the notice,

pleading, citation, petition, summons, subpoena, order of the

Commission, execution, commitment, or other process was received by

him and the time and manner the same was served by him.