; and (2) such State program provides adequate enforcement. Upon authorization of a date program under this section, it shall be unlawful for any person to violate or fail or refuse to comply with any requirement of such program. (c) Withdrawal of authorization If a State is not administering and enforcing a program authorized under this section in compliance with standards, regulations, and other requirements of this title, the Administrator shall so notify the State and, if corrective action is not completed within a reasonable time, not to exceed 180 days, the Administrator shall withdraw authorization of such program and establish a Federal program pursuant to this title. (d) Model State program Within 18 months after the enactment of this title, the Administrator shall promulgate a model State program which may be adopted by any State which seeks to administer and enforce a State program under this title. Such model program shall, to the extent practicable, encourage States to utilize existing State and local certification and accreditation programs and procedures. Such program shall encourage reciprocity among the States with respect to the certification. (e) Other State requirements Nothing in this title shall be construed to prohibit any State or political subdivision thereof from imposing any requirements which are more stringent than those imposed by this title. (f) State and local certification The regulations under this title shall, to the extent appropriate, encourage States to seek program authorization and to use existing State and local certification and accreditation procedures, except that a State or local government shall not require more than 1 certification under this section for any lead-based pipe activities contractor to carry out lead-based pipe activities in the State or political subdivision thereof. (g) Grants to States The Administrator is authorized to make grants to States to develop and carry out authorized State programs under this section. The grants shall be subject to such