Section 68. Any mortgagee doing business in the commonwealth and licensed as an insurance producer pursuant to section 162M or 162N of chapter 175, when making a mortgage loan secured by residential real estate located in the commonwealth, shall be subject, in addition to all applicable provisions of said chapter 175, to conditions and limitations established by the commissioner of banks pursuant to section 2A of chapter 167F; provided, however, that the provisions of clause (a) of subparagraph (6) of said section 2A shall not be applicable to any such mortgagee which does not accept deposits.