This is the only flag allowed to fly above the Stars and Stripes

Technically, no "flag" is allowed to fly above Old Glory, however there is one pennant that is allowed to fly above.

"The U.S. Flag Code provides that "No other flag or pennant should be placed above or, if on the same level, to the right of the flag of the United States of America, except during church services conducted by naval chaplains at sea, when the church pennant may be flown above the flag during church services for the personnel of the Navy."
According to NTP-13(B), "Flags, Pennants and Customs," the U.S. Navy interprets "at sea" to mean "aboard a ship of the navy." The church pennant is displayed immediately above the ensign wherever the ensign is displayed--at the gaff when under way or at the flagstaff when not under way. It may also be flown from a fixed pole-mast during services ashore, but not superior to the national ensign."

My town needs to know this flag code. The Mexican flag doesn't go on top of ours, mang

A very educational read, thanks