Link to the Planning Board Map (This map was last edited on July 2nd, 2020): (Not guaranteed to be accurate, some planning boards may be missing, please use at your own caution, links to the planning boards are included for your own research purposes)
https://drive.google.com/drive/folders/1smtVC78TpnDwMowuxGHFg62IJHWRPeea?usp=sharinghttps://www.arcgis.com/home/webmap/viewer.html?webmap=0e642ea001584766a06ba23e26a3b0cf

Data is sourced from:
Ontario / Canadian Geohub: https://geohub.lio.gov.on.ca/datasets/municipal-boundaries-as-of-1996
Esri, Airbus DS, USGS, NGA, NASA, CGIAR, N Robinson, NCEAS, NLS, OS, NMA, Geodatatyrelsen, Rijkswaterstaat, GSA, Geoland, FEMA, Intermap and the GIS user community, HERE, Garmin, FAO, NOAA, USGS, OpenStreetmap Contributers, and the GIS User Community