Wyo. Stat. Ann. § 35-4-224

The department of health has no authority to regulate, or to promulgate or enforce rules, regulations or standards regulating the design and construction of sewerage and water facilities within a mobile home park. This does not preclude the department from promulgating and enforcing rules and regulations or standards regulating the health of persons within a mobile home park and inspecting sewerage and water facilities within a mobile home park upon completion of the construction of such facilities.