2.__Register of critical areas.__The commissioner, with the advice of the board, shall maintain a register of critical areas that must contain natural areas classified as critical areas as follows.

A.__In determining the classification of an area or site as a registered critical area, the commissioner shall consider:

(1)__The unique or exemplary natural qualities of the area or site;

(2)__The intrinsic fragility of the area or site and sensitivity to alteration or destruction;

(3)__The voluntary commitment to conserve or protect the area or site;

(4)__The present or future threat of alteration or destruction; and

(5)__The economic implications of inclusion of an area or site on the register.

The commissioner, with the advice of the board, may remove a registered critical area from the register if the commissioner determines that the area or site no longer qualifies as a critical area.

B.__Each registered critical area must be documented with at least the following information:

(1)__A general description of the area or site;

(2)__A list of the endangered or threatened species or other unique or exemplary natural features occurring at the area or site, and reasons for inclusion in the register;

(3)__The size and location of the area or site; and

(4)__The name or names of the property owner or owners, contingent upon the consent of the owner or owners.

C.__The commissioner shall notify owners of natural areas of the natural value of their land and the implications of voluntary conservation.__Subsequently a natural area may be placed upon the Register of Critical Areas with at least 60