Section 435.34 - Closure of Pool(1) The operator shall be familiar with the provisions of 105 CMR 435.000 and every other applicable law and regulation pertaining to swimming, wading and special purpose pools including testing equipment and safe handling of chemicals.(2) If at any time the swimming, wading or special purpose pool water does not conform with the requirements set forth in 105 CMR 435.28 through 435.31, the operator shall immediately close the pool until the pool water conforms with those standards.