"By January 1, 2009, all public swimming pools serving or installed for the state or any political subdivision of the state, including a school district, municipality, or recreation district with 2000 square feet (185 m2) or more pool surface area in one or more pools must have at least one currently Certified Pool Operator, on staff, as defined in OAR 333-060-0015(6)." . . . . . . .