Section 87W. Any demonstrator who has had at least 3 months of practical experience as such and who, after application, accompanied by a notarized affidavit from each manufacturer or distributor for whom the demonstrator is or was employed during such 3–month period and the fee as provided in section 87CC, together with 2 pictures of the applicant, may be licensed by the board as a demonstrator and thereafter may practice as a demonstrator. Any person who is licensed as a hairdresser, barber, cosmetologist, aesthetician, operator or instructor may, upon payment of said fee, be licensed also as a demonstrator and may thereafter practice as such. Such demonstrations shall be given by a demonstrator only in a licensed shop, in the business quarters of distributors or supply houses in the commonwealth, at professional trade shows or meetings in the presence of licensed shop owners and their employees or in schools or post-secondary institutions with a licensed instructor in attendance or in another location authorized by the board.