Wyo. Stat. Ann. § 22-29-118

All directors, whether elected or appointed, shall, within ten (10) business days after notification of election or appointment, take the oath of office provided in Wyoming constitution, article VI, section 20, before an officer authorized to administer oaths. The director shall also complete the written oath and without delay transmit a copy of the oath in writing to the respective county clerks for the first election and to the secretary of the district thereafter.