Quarantine with a disinfecting stove, have a right to navigate the Canal, in quarantine, subject only to the landing of those who were suffering from plague. Plain yellow, green, and even black flags have been used to symbolize disease in both ships and ports, with the color yellow having a longer historical precedent, as a color of marking for houses of infection, previous to its use as a maritime marking color for disease. The present flag used for the purpose is the "Lima" (L) flag, which is a mixture of yellow and black flags previously used. It is sometimes called the
Flag of India 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