Chapter 94G of the General Laws is hereby amended by adding the following section:-

Section 22. Any marijuana-related event, forum, convention or conference to promote or encourage marijuana use or to educate users or prospective users on marijuana use, marijuana products or marijuana accessories held at any location in the commonwealth shall have a minimum age requirement of 21 years of age, and the organizer of such event, forum, convention or conference shall ensure that any person attending the event is at least 21 years of age; provided, however, that this section shall not apply to marijuana use prevention programs for youth, youth educational programs or substance misuse programs related to marijuana use.

An event organizer that fails to comply with this section shall be punished by a fine of not more than $2,000; provided that an event organizer who reasonably relies on: (i) a liquor purchase identification card issued pursuant to section 34B of chapter 138, (ii)  a motor vehicle license issued pursuant to section 8 of chapter 90, (iii) an identification card issued under section 8E of said chapter 90, (iv) a valid passport issued by the United States government, or by the government, recognized by the United States government, of a foreign country, or (v) a valid United States issued military identification card, for proof of a person's identity and age shall be presumed to have acted with due care and shall not be found to have failed to comply with this section; but such presumption shall be rebuttable.