Customs amendment updates exempt feed grade amino acids, specifying L lysine, L lysine monohydrochloride and methionine variants. The Central Government amends the principal customs exemption notification by substituting the Table entry against S.No.72 in column (3) to list specifically the feed-grade products: L lysine, L lysine monohydrochloride, DL methionine and methionine hydroxy analog, thereby limiting the exemption benefit to those enumerated compounds.