Flag Etiquette back to Mangelsen's
The Stars and Stripes takes precedence over all other flags when flown
within the United States. It should not be flown lower than another flag
nor should it be smaller than another flag flown with it. Other flags may,
however, be flown at the same height and in the same size. Other national
flags should not be smaller nor flown lower than the Stars and Stripes when
displayed together. If it is not possible to display two or more national
flags at the same height, it is not proper to display them together at all.
The point of honor is on the extreme left from the standpoint of the observer
("the flag's right"). The order from left to right of flags when flown
together is: the Stars and Stripes, other national flags in alphabetical
order, state flags, county and city flags, organizational flags, personal
flag.
If one flag is at half-staff in mourning, other flags flown with it
should be at half-staff. First raise the flags to their peak, then lower
to half staff. The Stars and Stripes is raised first and lowered last.
A salute (hand over heart for those not in uniform) should be rendered when the flag is raised, lowered or carried by on parade; when the Pledge of Allegiance is recited, and when the national anthem is played (unless the flag is not present).
It is proper to fly the Stars and Stripes at night, but only if it is spotlighted.
No flag should be flown during weather which might damage it, based on a common sense interpretation of circumstances.
To extend the life of a flag, when it is torn it should be repaired and under no circumstances should a flag be folded while wet.
When a flag is no longer of dignified appearance and cannot be repaired, it should be destroyed in a dignified way (burned or sealed in a bag or box before being sent out for trash collection.)
In a public gathering (lecture hall, church, etc.) the Stars and Stripes should be to the right of the speakers or on the wall behind them.
The Stars and Stripes should be in the center of a group of flags only when: 1) the center pole is taller than the others or 2) when a fan like arrangement makes the center pole higher than the others.
It is not illegal or improper to fly any flag (state, ethnic group, organization, etc.) alone, but it is always preferable to display the Stars and Stripes at the same time.
Information from Valley Forge, the Greatest Name in Flags.