(i) The commissioner may amend a map by adding a previously unmapped or newly created wetland to the map, by significantly expanding or contracting the boundaries of a wetland shown on the map, or by deleting a wetland from the map, all as may be necessary to conform the map to actual onsite conditions. This will be done only after a copy of the proposed amended map has been made available for public inspection in the appropriate regional office of the department and in the office of the clerk of each affected local government, and only after the commissioner has provided notice of the proposed amendment and an opportunity for a public hearing on the proposal. The notice shall be sent by certified mail, not fewer than 30 days prior to any such hearing, to each owner of record, as shown on the latest completed tax assessment rolls, of land involved in the proposed amendment and also to the chief administrative officer and clerk of each affected local government. Notice of the proposed amendment shall also be published at least once in at least two newspapers having a general circulation in the area that is the subject of the proposed amendment, and also in the department's environmental notice bulletin. If a hearing is scheduled, notice shall be provided to the same parties, and also published, in the same manner, not more than 30 nor fewer than 10 days before the date set for the hearing. Once the announcement of a proposed amendment has been made, no activity subject to regulation pursuant to the act shall be initiated within the area that is the subject of the proposal until the commissioner has either amended the map or denied the amendment. However, no activity which has already been initiated at the time of the announcement, within an area that is proposed as an addition to the map, will be subject to such regulation.

(ii) Notwithstanding subparagraph (i) of this paragraph, the commissioner may make minor adjustments to a map as follows: to reflect natural changes that have occurred through erosion or accretion since the effective date of the map, as originally established or amended; to reflect changes that have occurred as a result of granting permits under the act; to clarify the boundaries of any wetlands; to correct minor errors; or to effect other technical changes. These adjustments may be made only after notice by certified mail to each owner of record, as shown on the latest completed tax assessment rolls, of land involved in the adjustment and to the chief administrative officer of each affected local government, at least 30 days prior to the issuance of an order adjusting the map. A public hearing will not be held on any such proposed adjustment unless the commissioner determines that it is appropriate, at which time the provisions set forth in subparagraph (i) of this paragraph shall apply.