If I wear a police or fire uniform, am I breaking any laws?

Yes! New York City has a law (AG 14-107) prohibiting the possession and use of any "uniform, shield buttons, wreaths, numbers or other insignia or emblem in any way resembling that worn by members of the police force." Section 15-120 applies to Fire Department uniforms and badges. Violation of these laws is a misdemeanor.

What about wearing a FedEx or UPS uniform?

As long as you are not attempting to deceive someone into thinking you