The board shall cause to have prepared and shall adopt a code of ethics, a copy of which must be made available to every registrant and applicant for registration under this chapter, and which must be published in the roster provided under this chapter. Such publication constitutes due notice to all registrants. The board may revise and amend this code of ethics from time to time and shall notify each registrant of such revisions or amendments. The code of ethics applies to all certificate holders, individual and certificate of commercial practice, including specialists in a particular branch of the engineering or surveying profession.