To ensure any
a) Existing onsite sewage works regulated under the Ontario Building Code Act, 1992, including expansions, modifications or replacements of such systems, or
b) New onsite sewage works regulated under the Ontario Building Code Act, 1992, required for a municipal water supply well cease to be or never become a significant drinking water threat, where this activity is or would be a significant drinking water threat, the County shall implement an on-site sewage system maintenance inspection program, as required by the Ontario Building Code Act, 1992.