 The decision must be issued before 1 December immediately following the making of the proposal of a revaluation year or within such other time as the Chief Executive may direct.Whenever the Commissioner serves a notice of an amendment to a valuation list by way of a correction, a deletion or an interim valuation, an aggrieved owner or occupier may, within 28 days, serve on the Commissioner a notice of objection in the specified form stating fully the grounds of objection, i.e.