Okla. Stat. tit. 63, § 63-1-745.41: Venue

A. Notwithstanding any other law, a civil action brought under

Section 9 of this act shall be brought in:

1. The county in which all or a substantial part of the events

or omissions giving rise to the claim occurred;

2. The county of residence for any one of the natural person

defendants at the time the cause of action accrued;

3. The county of the principal office in this state of any one

of the defendants that is not a natural person; or

4. The county of residence for the claimant if the claimant is

a natural person residing in this state.

B. If a civil action is brought under Section 9 of this act in

any one of the venues described by subsection A of this section, the

action shall not be transferred to a different venue without the

written consent of all parties.