Addendum / Schedule
Plain-language definition: Additional pages attached to the APS (or listing agreement) that add, clarify, or change terms beyond the standard form. This is where you’ll often see details about inclusions/exclusions, special conditions, or unique property situations.
Greater Sudbury example
A seller in Valley East includes a schedule outlining exactly which appliances are included, plus a clause about a rented hot water tank so there’s no confusion later.