There hereby is created a Formal Japanese Garden Commission for the City. The Commission shall consist of the Mayor, the Commissioner In Charge of the Bureau of Parks, the President of the Japan Society of Oregon, the President of the Japanese Ancestral Society, the Japanese Consul, and 12 persons appointed by the Mayor. All appointments shall be by the Mayor for 3-year terms, provided, when an interim vacancy occurs the appointment shall be to fill the unexpired term of the position vacated. All members shall serve without compensation.