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 Hong Kong pole. When lowering the flag from half-mast, it should first be raised to the peak of the pole before it is lowered. The Regional Flag and Regional Emblem Ordinance states what manner of use of the Hong Kong flag is prohibited and that desecration of the flag is prohibited; it also states that it is a punishable offence for a person to use the flag in a prohibited manner or desecrate the flag. According to the ordinance, a flag may not be used in advertisements or trademarks, and that "publicly and wilfully burning, mutilating, scrawling on, defiling or trampling" the