For new septic systems or septic system holding tanks regulated under the Ontario Building Code Act, with the exception of:

those required for a municipal water supply well; or
those located within an ICA, but outside of a WHPA-A or B with a vulnerability score of 10,

where these activities would be a significant drinking water threat, the Area Municipalities shall amend their respective Zoning By-laws to prohibit uses, buildings or structures that would require a new septic system or septic system holding tank to be located within the above noted significant drinking water threat areas so that these activities never become significant drinking water threats.

OC-5.02: Where this Source Protection Plan requires the County or Area
Municipality to amend their Official Plan and/or Zoning By-law and provide
confirmation of such amendments to the Source Protection Authority, they
shall provide confirmation of such compliance within 30 days of adoption of
the amendment(s) by County and/or Area Municipal Council or, where the
matter has been appealed to the Ontario Municipal Board, the date their
decision is issued.