(1) Subject to subsection (5), an individual licensed under this act to carry a concealed pistol, or who is exempt from licensure under section 12a(1)(f), shall not carry a concealed pistol on the premises of any of the following:
(d) A bar or tavern licensed under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, where the primary source of income of the business is the sale of alcoholic liquor by the glass and consumed on the premises. This subdivision does not apply to an owner or employee of the business. The Michigan liquor control commission shall develop and make available to holders of licenses under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, an appropriate sign stating that "This establishment prohibits patrons from carrying concealed weapons". The owner or operator of an establishment licensed under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, may, but is not required to, post the sign developed under this subdivision. A record made available by an establishment licensed under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, necessary to enforce this subdivision is exempt from disclosure under the freedom of information act, 1976 PA 442, MCL 15.231 to 15.246.