Currently there is a mess of duplicated independently maintained UNIDs inside of the core game, especially the arena files, in order to locally use the SOTP soundtrack UNIDs.

The library itself can be put in the compatibility UNID library space (0x0071XXXX) - it does not need a special allocation. It should not require any force-loading, as anything using the soundtrack UNIDs was already defining them or simply using extends="0x00820000"