Okla. Stat. tit. 43, § 150.9

A. The deploying parent shall notify the nondeploying parent of the completion of the deployment. If the deploying parent is unable to locate the nondeploying parent, the deploying parent shall notify the court of the return. B. A temporary modification order granted in accordance with the Deployed Parents Custody and Visitation Act shall terminate by operation of law ten (10) days after notice has been provided to the nondeploying parent of the completion of deployment and the original terms of the prior custody or visitation order shall be automatically reinstated.