 SRT is the centralised agency for the recording of known historical tartans and for paid registration of new tartan designs, which must fulfill fairly stringent criteria.SRT subsumed this registration role from a variety of previous not-for-profit and commercial organisations, most now defunct.Since December 2018, the Keeper of the Scottish Register of Tartans is the head of the NRS (who is also the Keeper of Records and Registrar General for Scotland more broadly).