What can an employer in Mississippi not do regarding firearms in vehicles on their property?

In Mississippi, there are specific laws that protect an individual's right to transport and store firearms in their vehicles, particularly on their employer's property. The law allows employees to keep firearms in their locked vehicles, prohibiting employers from imposing blanket bans on this practice. Therefore, an employer cannot legally prohibit individuals from storing firearms in locked vehicles on their property, which makes this option the correct choice.

The other options reflect actions that, while potentially permissible under certain circumstances, do not represent prohibitions that conflict with state law concerning gun storage in vehicles. Allowing firearms in open areas (for instance, outside the building) does not infringe on the right to keep them locked in vehicles. Similarly, while an employer may express preferences about firearms, they cannot mandate employees to leave firearms at home or require gun registration with management, as these could be seen as infringements on personal rights and may not align with the legal protections for gun owners.