Whoever, being appointed to sell postage stamps,--
         (a) takes from any purchaser for any postage stamp or quantity of postage stamps a price higher than that fixed by any rule made under section 16, sub-section (3), clause (a), shall be punishable with imprisonment for a term which may extend to six months, or with fine which may extend to two hundred rupees, or with both; or
         (b) commits a breach of any other rule made under section 16, shall be punishable with fine which may extend to two hundred rupees.