Section 12. Whoever directly or indirectly, except as provided in sections 32 to 50A, inclusive, of chapter 147, gives, promotes or engages in a public boxing, kickboxing, mixed martial arts or other unarmed combative sporting match or sparring exhibition, or engages in a private boxing, kickboxing, mixed martial arts or other unarmed combative sporting event match or sparring exhibition, for which the contestants have received or have been promised any pecuniary reward, remuneration or consideration whatsoever shall be punished by imprisonment in the house of corrections for not more than 3 months or by a fine of not more than $5,000, or both such fine and imprisonment.