The Assessment Review Board has updated their Rules of Practice and Procedure, effective April 1, 2021.
For these new rules and guidelines, including highlights and downloadable word or pdf files, please visit their website at: https://tribunalsontario.ca/arb/legislation-and-rules/
Other important links:
Deadline to file an appeal: https://tribunalsontario.ca/arb/filing-an-appeal/
General information regarding the Assessment Review Board: https://tribunalsontario.ca/arb/