324.43518 'Department' defined; signature requirement for valid license. Sec. 43518. (1) As used in this section to section 43544, 'department' includes a person designated by the department to issue and sell licenses. (2) A license issued under this part is not valid unless it is signed as required by the department. History: Add. 1995, Act 57, Imd. Eff. May 24, 1995 Popular Name: Act 451Popular Name: NREPA