Sec. 7. (a) A rule adopted by the department of human services concerning social services under IC 4-28-6, as repealed by P.L.9-1991, is valid and effective until the division of family and children adopts a rule under IC 4-22-2 that:
(1) supersedes in whole or in part the department of human services rule; or
(2) repeals the department of aging and rehabilitative services rule.
(b) Notwithstanding subsection (a), if a rule adopted by the department of human services before January 1, 1992:
(1) has not been superseded or repealed as provided in subsection (a); and
(2) provides authority to the department of human services that has been transferred to the division of family and children under P.L.9-1991;
that rule shall be interpreted to constitute an authorization to the division of family and children and not the department of human services.