Mich. Admin. Code R. 29.7071
Rule 71. Sections 1-2 and 1-2.1of the storage and handling of gaseous and Liquefied H2 code are added as follows:
1-2 Retroactivity.
1-2.1 The provisions of this H2 code are necessary to provide a reasonable level of protection from loss of life and property from fire and explosion. The provisions shall reflect situations and the state of the art prevalent when the H2 code was issued. Unless otherwise noted, it shall not be intended that the provisions of this H2 code be applied to facilities, equipment, structures, or installations that were existing or approved for construction or installation before the effective date of this H2 code, except in those cases where it is determined by the department that the existing situation involves a distinct hazard to public health, safety, and welfare, and the environment.
Mich. Admin. Code R. 29.7071