When any person who shall have received any benefits from the System shall fail to report himself for examination for duty as required herein, unless excused by the State Board, or shall disobey the requirements of said State Board under this article, in respect to said examination or duty, then the State Board shall order that such pension or allowance as may have been granted to such person shall immediately cease, and such person shall receive no further pension or allowance or benefit under this article.
Okla. Stat. tit. 11, § 49-117