In The Workplace (MS)

While there seems to be no statutory limitation on a business owner’s right to prohibit possession of weapons within the business’ building unless possession is limited by other law,[21] an employer (public or private) may not prevent employees from bringing firearms in locked, privately-owned[22] vehicles in the parking lot,[23] unless general public access to the lot is limited by a gate, security station or other means.[24]  An employer is immune from civil liability for damages which result from firearms permitted by this law.[25]