Section 39. Nothing in sections twenty-nine to thirty-nine, inclusive, shall affect any of the other provisions of this chapter and all of said other provisions shall continue in full force and effect and shall apply to sections twenty-nine to thirty-nine, inclusive, insofar as they are applicable. Unless the commissioner shall otherwise prescribe, all licensees shall be subject to all the duties, obligations, restraints, prohibitions and provisions which are imposed by this chapter on such licensees, notwithstanding that certain of such licensees may also act as, and be subject to the provisions of, stampers.