Section 108(c) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(c)The following shall be observed when State mourning has been announced by the Government of India during a prescribed period:(i)There shall be no official entertainment;(ii)All flags on public or official buildings shall be flown at half-mast; colours in Indian Naval Ships and shore establishments shall remain at half-mast from the time of receipt of orders promulgating state mourning until sunset on the day of the funeral.
