045-16 Wyo. Code R. § 16-7
(a) Type I Official Signs are signs and notices erected and maintained by public officers or public agencies within their territorial or zoning jurisdiction to carry out an official duty or responsibility. These signs shall not be any larger than necessary to adequately inform the traveling public. The Department shall approve the location of official Type I signs before erection, but these signs do not require an advertising permit.
(b) Type II Official Signs are signs and notices relating to meetings of nonprofit service clubs or charitable associations or to religious services. The size of these signs shall not exceed an area of 8 square feet. The message content is limited to the organization's name and the meeting times. No more than one such sign may be erected in each approach direction of traffic. The Department shall approve the location of official Type II signs before erection, but these signs do not require an advertising permit.
045-16 Wyo. Code R. § 16-7