S. 194A: Deduction at source-Interest other than interest on securities-Co-operative society-Constitutional validity-Deduction of tax at source-Provision making it obligatory for co-operative societies to deduct tax on payments of interest where total sales, gross receipts or turnover of assessee exceeds Rs. 50 crores-Provision valid-Interpretation of taxing statutes-Proviso-Statutory stipulation in the form of a proviso. Proviso introduced, bringing in conditions restricting operation of main provision. Permissible-hardships or inconvenience of the party subjected to law, by itself not a ground for judicial interference.[S.194A(3)(iii), Banking Regulation Act, 1949, S. 5(b), Art. 14, 226]