The ' Central Excise Manual (Seventh Edition) at p. 123 states the position thus: "26AA(2) Iron or Steel products falling under item No. 26AA, if made from another article falling under the said item or item No. 63 36) of the First Schedule to the Indian Tariff Act, 1934 (32 of 1934) and having already paid the appropriate amount of excise or countervailing customs duty, as the case may.be, are exempt with effect from 24th April, 1962, from so much of the duty of excise as is equivalent to the excise or countervailing customs duty payable on the said article ' vide Government of India, Ministry of Finance (Department of Revenue) Notification No. 89/62 Central Excise, dated 10th May, 1962 (issued in supersession of Notification No. 77/62 Central Excises, dated 24th April, 1962, as further amended by Notifications No. 93/62 Central Excises, dated 26th May, 1962, and No. 225/62 Central Excises,dated 29th December, 1962.