Section 18(3)(ii) in The Static and Mobile Pressure Vessels (Unfired) Rules, 2016
(ii)all liquid and vapour connections on vessels, except those for relief valves, and drainage connections of small diameter, shall have an emergency shut off valve such as, an excess flow valve, an automatically operated valve or remotely controlled valve. The emergency shut off valve shall be in addition to the shut-off valve referred to in clause (i) unless the emergency shut off valve is a remotely controlled valve which can be operated from a safe area and shall be of a type which shall not fail: