Okla. Stat. tit. 36, § 1165
No employer shall require any employee who is retired from a branch of the United States military and has been provided with health coverage through a federal plan to participate in employer-sponsored health insurance coverage if the health insurance coverage requires a contribution from the employee. The employee shall provide to the employer before the beginning of each plan year proof of that coverage.
Laws 2012, SB 1905, c. 260, § 1, eff. November 1, 2012.