GST applicability to bitumen and asphalt under the schedule remains in force for the transitional period. The provision classifies bitumen and natural asphalt-including bituminous or oil shale, tar sands, asphaltites and asphaltic rocks-within Schedule 3 and prescribes the applicable GST treatment for these goods until 21-09-2025, thereby directing the rate and tax treatment for supply, import and related taxable events involving these materials during the stated period.