045-I Wyo. Code R. § 1.6
Posted speed limits (other than statutory speed limits) on Wyoming paved roads open to the public that have been established by this procedure should be documented by a Declaration of Speed Limit form similar to the form shown in Figure 1-6. A completed declaration of speed limit form is shown in Figure 1-7. Note that any speed limit change from the statutory limits shall be verified and sealed by a registered professional engineer in Wyoming. The form, with appropriate background information should be presented to the county commission where a resolution approving the proposed speed limit should be approved. The resolution number should be added to the declaration of speed limit form. The form is then returned to appropriate county officials so that the necessary signing changes can be made. Enforcement of the new speed limit cannot occur until the appropriate signs giving notice of the new speed limit have been erected.
Counties can modify this declaration form to fit their local needs. Counties should develop their own systems to record and save all relevant information associated with the speed study and the resolution.
045-I Wyo. Code R. § 1.6