Official regulation states that the flag must never touch the ground or water, or be used as a drapery in any form. The flag may not be intentionally placed upside down, dipped in anything, or hold any objects other than flower petals before unfurling. No sort of lettering may be inscribed on the flag. When out in the open, the flag should always be flown between sunrise and sunset, irrespective of the weather conditions. Prior to 2009, the flag could be flown on a public building at night under special circumstances; currently, Indian citizens can fly the flag even at night, subject to the restriction that the flag should be hoisted on a tall flagpole and be well-illuminated.