law: 37. Power of Central Government to make model rules.
  (1) Notwithstanding anything contained in section 36 of this Act:
  (a) the Central Government shall, by notification, publish model rules for the guidance and use of State Governments; and
  (b) in case the State Government fails to notify the rules under section 36 of this Act within the period of three months specified therein, then the model rules as notified by the Central Government shall be deemed to have come into effect, mutatis mutandis, in such State, till such time as the State Government notifies its rules.
  (2) The model rules made by the Central Government under this Act shall be laid, as soon as may be after they are made, before each House of Parliament while it is in session, for a total period of thirty days which may be comprised in one session or in two or more successive sessions, and if, before the expiry of the session immediately following the session or the successive sessions aforesaid, both Houses make any modification in the rule, the rule shall thereafter have effect only in such modified form; so, however, that any such modification shall be without prejudice to the validity of anything previously done under that rule.