Section 41(2)(iv) in The Merchant Shipping (Standards of Training, Certification and Watchkeeping for Seafarers) Rules, 1998
(iv)an appropriate and effective watches are maintained for the purpose of safety at all times, while the ship is at anchor or moored and, if the ship is carrying hazardous cargo, the organisation of such watches takes full account of the nature, quantity, packing and stowage of the hazardous cargo and of any special conditions prevailing on board, afloat or ashore.