Okla. Stat. tit. 16, § 16-9: Copy of petition to be served

At least thirty (30) days before the hearing of the petition,

the applicant or his attorney shall serve a copy of the petition

upon the nearest competent relative of the incapacitated spouse in

this state. If there is no such relative known to the applicant, a

copy of the petition shall be served upon the district attorney of

the county in which the homestead is located. The district

attorney, if served with a copy of the petition, shall appear in

court and see that the application is made in good faith and that

the proceedings thereon are fairly conducted.