GST rate concession for parts of specified vessel and floating-structure headings applies as limited-term schedule treatment. Goods comprising parts of vessels and floating structures under headings 8901, 8902, 8904, 8905, 8906 and 8907 qualify for Schedule 1 concessional treatment, attracting GST at 5% until 21-09-2025; classification by those tariff headings determines eligibility for the reduced rate.