If sound or music tag is not playing, play sound.
Now this is on a sheet called "PalacesSharedSheet" and all the temples and palaces use this particular line of code so no matter what frame you are in, each frame's sheet will call on (via include) PalacesSharedSheet and thus have this music code included.
In many cases, layouts will need different tweaking, so each layout SHOULD have it's own Event Sheet, but that doesn't mean some things will carry over as common (music, sound effects, player controls, etc). Most of my sheets include "Platform" for character, TownSharedSheet (or Palaces) for similar things in towns (or palaces), and a few others. The layout "TownA1" has a sheet called "TownA1Sheet" and the same for "TownA2" having "TownA2Sheet". Both TownA1Sheet and TownA2Sheet have "TownSharedSheet" with shared things like the character's motions (on his own sheet, included in TownSharedSheet) and music and sound effects.