No association shall, without authorization by the commissioner, establish a savings branch office, loan branch office or a loan processing office. The commissioner shall prescribe the form of the application, prerequisites and requirements for the above types of offices. If no protest is filed after notice has been given as provided in Section 81-12-29(1), the commissioner may approve the application for the above-described limited service branch offices if the established prerequisites and requirements are met. If protests are filed, the commissioner, upon reasonable notice to the applying association and its attorney and to the protestants and their attorneys, shall hold a hearing and, based upon his written findings at such hearing, issue a certificate of approval or disapproval.