Quarantine "yellow jack" but this was also a name for yellow fever, which probably derives its common name from the flag, not the color of the victims (cholera ships also used a yellow flag). The plain yellow flag ("Quebec" or Q in international maritime signal flags) probably derives its letter symbol for its initial use in "quarantine", but this flag in modern times indicates the opposite—a ship that declares itself free of quarantinable disease, and requests boarding and routine port inspection. Australia has perhaps the world's strictest quarantine standards. Quarantine in northern Australia is important because of its proximity to South-east
Flag of the Philippines arenas, casinos, disco venues, night and day clubs, gambling joints and "places of vice or where frivolity prevails" is illegal. The flag may be flown at half-mast as a sign of mourning. Upon the official announcement of the death of the President or a former President, the flag should be flown at half-mast for ten days. The flag should be flown at half-mast for seven days following the death of the Vice President, the Chief Justice, the President of the Senate or the Speaker of the House of Representatives. The flag may also be required to fly at half-mast upon