15. The water depth at the end of the diving platform or spring board and for a semi-circle of a 3-metre radius beyond the end of the diving platform or spring board shall not be less than:(a) 2.7 m for a spring board or diving platform situated 0.5 m or less above the water;
(b) 3 m for a spring board or a diving platform higher than 0.5 m but less than 1 m above the water.