Section 16. A primary or election officer, or a director of the count or assistant appointed under section six of chapter fifty-four A, who wilfully violates any provision relating to the enclosing in envelopes or containers, sealing, endorsing and delivering or transmitting of ballots and voting lists, before or after the votes have been counted and recorded, shall be punished by a fine of not more than five hundred dollars or by imprisonment for not more than one year.