B-1.1, r. 2 - Construction Code

Full text
8.57. A contractor or owner-builder may not install an aboveground tank that has piping or a fitting connected to it at a point below the highest level to which the petroleum product it contains may rise, unless the piping or fitting has a shut-off valve that meets the requirements of one of the standards referred to in section 8.115 and is located as near as is practicable to the shell of the tank.
O.C. 220-2007, s. 1.