The authority shall hold its meetings in a building that is accessible to persons with disabilities. Six voting members of the board shall constitute a quorum, and the affirmative vote of a majority of members in attendance at a meeting shall be necessary for any action taken by the board. No vacancy in the membership of the board shall impair the power of a quorum to exercise all rights and perform all duties of the authority. Notwithstanding N.H. Rev. Stat. Chapter 91-A or any other law to the contrary, members of the board shall be permitted to participate in meetings by telephone, provided that any board member so participating shall be able to be heard by and to hear every other member of the board participating in the meeting, and, unless the board is meeting in a nonpublic session as permitted by N.H. Rev. Stat. § 91-A:3, shall be able to be heard by all members of the public attending the meeting. Voting members of the board participating by telephone shall be treated as present at the meeting for all purposes, including the establishment of a quorum. Any meeting at which one or more board members are participating by telephone shall be recorded verbatim by magnetic tape or otherwise, and such recording shall be made available for public inspection to the same extent as minutes of the meeting, provided that the accidental destruction of a recording or the accidental failure to record any meeting shall not invalidate any action taken at that meeting.