An at-a-glance Chart listing states with guns-at-work laws, sometimes known as parking lot laws or "guns-in-trunks" law. Guns-at-work laws generally limit an employer's ability to prohibit employees from bringing concealed firearms to work. This Chart lists states with guns-at-work laws covering private employers. It outlines which state laws restrict an employer's ability to prohibit employees from storing firearms in their private vehicles when parked in the employer's parking lot. This Chart also lists laws that provide employer immunity and those that require employers to post notice that they prohibit guns at the workplace.