RSA 318:1-a: Exceptions and Exemptions Not Required to be Negated.

In any complaint, information, or indictment, and in any action or proceeding brought for the enforcement of any provision of this chapter, it shall not be necessary to negate any exception, excuse, proviso, or exemption contained herein, and the burden of proof of any such exception, excuse, proviso or exemption shall be upon the defendant.