As used in this part, “Saginaw bay” means those waters lying inside of a line drawn from Tawas point lighthouse in Iosco county to a monument which shall be erected by the department on Oak point in Huron county, including the waters of Tawas bay, in which area nets may be set and used as provided by law. However, nets shall not be set or used in any of the following locations:

    (a) Within that area between the shoreline and a line drawn from a monument which shall be erected by the department on Fish point in Tuscola county to a monument which shall be erected by the department on the westerly point of Stony island, thence to a monument which shall be erected by the department on the westerly point of North island, thence to a monument which shall be erected by the department on the westerly end of Sand point in Huron county. However, nets may be used in that part of this area lying southerly of the south line of section 21, town 16 north of range 9 east, extending due west. Seines not exceeding 5 feet in depth and 100 rods in length may be used in that part of this area lying northerly of the south line of section 21, town 16 north, range 9 east, extending due west, for the taking of noxious fish.

    (b) Within that area enclosed within and bounded by the following lines: beginning at the monument on Sand point described in subdivision (a), thence for a distance of 1 mile along a line drawn from that monument to a monument to be erected by the department on the easterly point of Little Charity island, thence 218 degrees along a line to a point where it would intersect a line drawn from the Gravelly point shoal lighthouse to the monument on North island described in subdivision (a), thence southeasterly along the latter line to the monument on North island, thence northeasterly to the point of beginning; the object being to provide a channel approximately 1 mile in width for the free passage of fish.

    (c) Within that area of Tawas bay bounded on the south by a line extending from the U.S. fog signal building on Tawas point due west to the mainland.