GST on monumental and building stone charged at reduced rate, applicable until specified expiry under Schedule 1. Goods under heading 2516, except subheadings 2516 11 00 and 2516 12 00, comprising porphyry, basalt, sandstone and other monumental or building stone, whether roughly trimmed or merely cut into rectangular blocks or slabs, are included in Schedule 1 and attract GST at a reduced rate of 5% for the time-limited period specified by the schedule entry.