The following words and terms, when used in this subchapter, shall have the following meaning, unless the context clearly indicates otherwise:
"Period of Coverage" The period of coverage for this benefit runs from January 1 through December 31 of a given Plan Year. For new hires electing this benefit, the period of coverage begins on the first day of the month following date of hire through December 31.
Okla. Admin. Code § 260:40-28-2