Okla. Stat. tit. 43A, § 43A-5-410

A. The following persons may file or request the district

attorney to file a petition with the district court, upon which is

hereby conferred jurisdiction, to determine whether an individual is

a person requiring treatment, and to order the least restrictive

appropriate treatment for the person:

1. A treatment advocate as defined in Section 1-109.1 of this

title;

2. The father, mother, husband, wife, grandparent, brother,

sister, guardian or child, over the age of eighteen (18) years, of

an individual alleged to be a person requiring treatment;

3. A licensed mental health professional;

4. A person in charge of any correctional institution;

5. Any peace officer within the county in which the individual

alleged to be a person requiring treatment resides or may be found;

or

6. The district attorney in whose district the person resides

or may be found.

B. The petition shall contain a statement of the facts upon

which the allegation is based and, if known, the names and addresses

of any witnesses to the alleged facts.

1. The petition shall be verified and made under penalty of

perjury.

2. A request for the prehearing detention of the individual

alleged to be a person requiring treatment may be attached to the

petition.

3. If the individual alleged to be a person requiring treatment

is being held in emergency detention, a copy of the mental health

evaluation shall be attached to the petition.

C. Petitions filed to determine if an individual should be

ordered to assisted outpatient treatment as defined by Section 1-103

of this title shall only be filed by a licensed mental health

professional employed by the Department of Mental Health and

Substance Abuse Services or employed by a community mental health

center certified by the Department pursuant to Section 3-306.1 of

this title.

D. The inpatient mental health treatment of minors shall be

pursuant to the provisions of the Inpatient Mental Health and

Substance Abuse Treatment of Minors Act.