All rules and regulations promulgated by the commissioner pursuant to authority conferred by this chapter or this title will be in accordance with the Uniform Administrative Procedures Act, compiled in title 4, chapter 5. In addition, at the time the commissioner files a notice of proposed adoption, amendment or repeal of a rule for public comment, a copy of the notice shall be sent by regular United States mail, postage prepaid, to all then current licensees under this chapter.