652, 658-59 (2013); Commonwealth v. Eberhart, 461 Mass. 809, 965 N.E.2d 791, 795 (2012); Commonwealth v. Jefferson, 461 Mass. 821, 965 N.E.2d 800, 809-11 (2012); Commonwealth v. Gouse, 461 Mass. 787, 965 N.E.2d 774, 788 n. 17 (2012); Commonwealth v. Young, 453 Mass. 707, 905 N.E.2d 90, 95 n. 9, 96 (2009); Commonwealth v. Colon, 449 Mass. 207, 866 N.E.2d 412, 429 (2007); Commonwealth v. Anderson, 445 Mass. 195, 834 N.E.2d 1159, 1173-74 (2005); Commonwealth v. Than, 442 Mass. 748, 817 N.E.2d 705, 708 (2004); Ramirez, 555 N.E.2d at 211; Commonwealth v. Tuitt, 393 Mass. 801, 473 N.E.2d 1103, 1109-10 (1985). This procedural framework with respect to license as an affirmative defense is not unusual even among federal statutes. See, e.g., United States v. Matthews, 749 F.3d 99, 104-05 (2014) (<HOLDING>). 5 . Powell contends that the SJC in his
recognizing the rule and the exception but holding facts did not support claim to exception recognizing exception holding that a defendant seeking the benefit of an exception under the pertinent statute must shoulder the burden of coming forward with evidence regarding that exception including a valid marijuana prescription recognizing such an exception holding in context of minnstat  541051 that burden of proving exception lies with party who seeks to claim benefit of exception