Wyo. Stat. § 18-5-307
The board may allow the county planning and zoning commission authorized under the provisions of W.S. 18-5-201 through 18-5-206 as the proper agency to receive and evaluate applications for subdivision permits. If so authorized the planning commission shall receive the materials required by this article and shall submit a copy of the application to the department of environmental quality for review as provided by W.S. 18-5-306(c) and, if applicable, to the fire protection district, fire protection authority or the nearest fire protection district as provided by W.S. 18-5-316(d). The commission shall make findings and recommendations to the board concerning an application within forty-five (45) days from the date the department of environmental quality submits its recommendation to the commission or from the date when the recommendation is due if no recommendation is made, whichever is earlier. If no action is taken by the planning commission within that time the plat is deemed to be approved by the planning commission.
W.S. 18-5-307