1. The commissioner shall, as soon as practicable, conduct a study to identify and map those individual freshwater wetlands in the state of New York which shall have an area of at least twelve and four-tenths acres or more, or if less than twelve and four-tenths acres, (a) have, in the discretion of the commissioner unusual local importance for one or more of the specific benefits set forth in subdivision seven of section 24-0105 of this article or (b) are located within the Adirondack park and meet the definition of wetlands contained in subdivision sixty-eight of section eight hundred two of the executive law, and shall determine their characteristics. This study shall, in addition to such other data as the commissioner may determine to be included, consist of the freshwater wetlands inventory of the department of environmental conservation, currently being made, together with other available data on freshwater wetlands, whether assisted by the state of New York under the tidal wetlands act or otherwise, or assembled by federal or local governmental or private agencies, all of which information shall be assembled and integrated, as applicable, into a map of freshwater wetlands of the state of New York. Such study may, in the discretion of the commissioner, be carried out on a sectional or regional basis, as indicated by need, subject to overall completion in an expeditious fashion subject to the terms of this chapter. This map, and any orders issued pursuant to the provisions of this article, shall comprise a part of the statewide environmental plan as provided for in section 3-0303 of this chapter. As soon as practicable the commissioner shall file with the secretary of state a detailed description of the technical methods and requirements to be utilized in compiling the inventory, and he shall afford the public an opportunity to submit comments thereon.

2. Upon completion of a freshwater wetlands inventory, the commissioner shall prepare a tentative freshwater wetlands map delineating the boundaries of such wetlands as determined by the study and inventory conducted pursuant to subdivision one of this section. The map may be prepared for different sections or regions of the state separately, as the commissioner shall determine. The commissioner shall consult and cooperate with the Adirondack park agency in the preparation of a tentative freshwater wetlands map for any area within the Adirondack park.

3. The tentative freshwater wetlands map shall set forth the boundaries of such wetlands as accurately as is practicable to inform the owners thereof, the public and the department of the approximate location of the actual boundaries of the wetlands, subject to motion for delineation pursuant to this section, or more precise definition thereof in the discretion of the commissioner. The commissioner shall take into consideration, whenever possible, the boundaries of the local government or governments within which the wetlands are located.

4. Upon completion of the tentative freshwater wetlands map for a particular area, the commissioner or his designated hearing officer shall hold a public hearing in that area in order to afford an opportunity for any person to propose additions or deletions from such map. The commissioner shall give notice of such hearing to each owner of record as shown on the latest completed tax assessment rolls, of lands designated as such wetlands as shown on said map and also to the chief administrative officer and clerk of each local government within the boundaries of which any such wetland or a portion thereof is located and, in the case of a tentative freshwater wetlands map for any area within the Adirondack park, to the Adirondack park agency, by certified mail not less than thirty days prior to the date set for such hearing and shall assure that a copy of the relevant map is available for public inspection at a convenient location in such local government. The map filed with a local government may, at the local government's request, be either a physical copy of the tentative freshwater wetlands map, or, if available, a digital file that represents it. The commissioner shall also cause notice of such hearing to be published at least once, not more than thirty days nor fewer than ten days before the date set for such hearing, in at least two newspapers having general circulation in the area where such wetlands are located. The commissioner may post on the department's website a digital image that represents the tentative freshwater wetlands map.

5. After considering the testimony given at such hearing and any other facts which may be deemed pertinent, after considering the rights of affected property owners and the ecological balance in accordance with the policy and purposes of this article, and, in the case of wetlands or portions thereof within the Adirondack park, after consulting with the Adirondack park agency, the commissioner shall promulgate by order the final freshwater wetlands map. Such order shall not be promulgated less than sixty days from the date of the hearing required by subdivision four of this section. A copy of the order, together with a copy of such map or relevant portion thereof shall be filed in the office of the clerk of each local government in which each such wetland or a portion thereof is located and, in the case of a map for any area within the Adirondack park, with the Adirondack park agency. The map filed with a local government may, at the local government's request, be either a physical copy of the final freshwater wetlands map, or, if available, a digital file that represents it. The commissioner shall simultaneously give notice of such order to each owner of lands, as shown on the latest completed tax assessment rolls, designated as such wetlands by mailing a copy of such order to such owner by certified mail in any case where a notice by certified mail was not sent pursuant to subdivision four of this section, and in all other cases by first class mail. The commissioner shall also give notice of such order at such time to the chief administrative officer of each local government within the boundaries of which any such wetland or a portion thereof is located. At the time of filing with such clerk or clerks, the commissioner shall also cause a copy of such order to be published in at least two newspapers having general circulation in the area where such wetlands are located. The commissioner may post on the department's website a digital image that represents the final freshwater wetlands map.

6. Except as provided in subdivision eight of this section, the commissioner shall supervise the maintenance of such boundary maps, which shall be available to the public for inspection and examination at the regional office of the department in which the wetlands are wholly or partly located and in the office of the clerk of each county in which each such wetland or a portion thereof is located. The commissioner may readjust the map thereafter to clarify the boundaries of the wetlands, to correct any errors on the map, to effect any additions, deletions or technical changes on the map, and to reflect changes as have occurred as a result of the granting of permits pursuant to section 24-0703 of this article, or natural changes which may have occurred through erosion, accretion, or otherwise. Notice of such readjustment shall be given in the same manner as set forth in subdivision five of this section for the promulgation of final freshwater wetlands maps. In addition, at the time notice is provided pursuant to subdivision five of this section, the commissioner shall update any digital image of the map posted on the department's website to reflect such readjustment.

7. Except as provided in subdivision eight of this section, the commissioner may, upon his own initiative, and shall, upon a written request by a landowner whose land or a portion thereof may be included within a wetland, or upon the written request of another person or persons or an official body whose interests are shown to be affected, cause to be delineated more precisely the boundary line or lines of a freshwater wetland or a portion thereof. Such more precise delineation of a freshwater wetland boundary line or lines shall be of appropriate scale and sufficient clarity to permit the ready identification of individual buildings and of other major man-made structures or facilities or significant geographical features with respect to the boundary of any freshwater wetland. The commissioner shall undertake to delineate the boundary of a particular wetland or wetlands, or a particular part of the boundary thereof only upon a showing by the applicant therefor of good cause for such more precise delineation and the establishment of such more precise line.

8. The supervision of the maintenance of any freshwater wetlands map or portion thereof applicable to wetlands within the Adirondack park, the readjustment and precise delineation of wetland boundary lines and the other functions and duties ascribed to the commissioner by subdivisions six and seven of this section shall be performed by the Adirondack park agency, which shall make such maps available for public inspection and examination at its headquarters.