Section 27(5)(iv) in Tamil Nadu Urban Local Bodies (Regulation and Monitoring of Swimming Pools) Rules, 2015
(iv)Rescue boards (Spine boards) - The most versatile and easy to handle board especially good for two guard rescues. Made of 5/8" marine plywood with capped wood runners on the bottom and capped bombers. Head immobilizer secures to board with pressure sensitive Velcro for quick and accurate immobilization.