Mich. Admin. Code R. 299.823
Rule 3. The provisions of subsection (h) of section 5 of Act No. 84 of the Public Acts of 1929, as amended, designating shoaling twine, are suspended and superseded by the following regulation: In trap nets with meshes not less than 4 1/2 inches in the lifting pot, used for taking whitefish and lake trout, meshes not more than 3 1/2 inches may be used (a) in that part of the tunnel inside the pot, (b) in the entire front of the pot, (c) in that portion of the bottom of the pot connected thereto for a distance up to 10 feet, but not to exceed 1/4 of the length of the pot, and (d) in the connecting sides for the full depth of the pot and of a width up to 10 feet, but not to exceed 1/4 of the length of the pot, for the purpose of shoaling fish.
Mich. Admin. Code R. 299.823