Interpretation of taxing statues- Exemption notification should be interpreted strictly; the burden of proving applicability would be on the assessee to show that his case comes within the parameters of the exemption clause or exemption notification. When there is ambiguity in exemption notification which is subject to strict interpretation, the benefit of such ambiguity cannot be claimed by the subject/assessee and it must be interpreted in favour of the revenue. The ratio in Sun Export Corporation ,Bombay v. Collector of Customs Bombay ( 1997) 6 SCC 564 is not correct and all the decisions which took similar view as in Sun Export Case stands overruled.