In Washington, D.C., is one allowed to carry pepper spray and/or mace on their person? If so, are there any regulations as far as registering the pepper spray/mace with the local police (in Massachusetts, for example, one has to apply for a Limited FID Card to able to legally carry pepper spray). I have been unsuccessful in finding an answer on the city's police website, and have heard mixed answers from local police. Please help to clarify!