Section 73I. Whoever, not being duly licensed as a dispensing optician, compounds and dispenses, at retail, prescriptions of physicians or optometrists for eyeglasses and lenses or makes duplicates thereof at retail, or holds himself out as a dispensing optician as defined in section seventy-three C, or violates any other provision of sections seventy-three C to seventy-three L, inclusive, or any rule or regulation of the board, shall be punished by a fine of not less than twenty-five dollars, or by imprisonment for not more than three months, or both.