On rare occasions, it is sometimes difficult to maintain a quorum on the Planning Board and/or Zoning Board of Appeals because members are ill, on extended vacation or find they have a conflict-of-interest situation on a specific matter before such Board. In such instances, official business cannot be conducted, which may delay or impede adherence to required time lines. Also, it is essential to have trained members with up-to-date knowledge of what has been or will be discussed by each Board, thereby making available experienced alternates to fill future appointments as needed. The use of alternate members in such instances is hereby authorized pursuant to the provisions of this article.