Excise exemption limits duty on certain fish and meat preparations to an ad valorem rate, reducing higher levy. The Central Government exempts goods under sub heading 1601.19 from so much of the excise duty leviable thereon as is in excess of the amount calculated at the rate of 10% ad valorem, exercising the exemption power under section 5A of the Central Excises and Salt Act, 1944 on grounds of public interest.