All boards, commissions, committees, and agencies created by the board of commissioners,
with the exception of the historic preservation commission, community appearance commission,
parks and recreation commission, water and sanitary sewer review committee, and zoning
board of adjustment, whether by ordinance or by informal appointment by the mayor
or board of commissioners, and all future boards, commissions, committees, and agencies
created by ordinance or by informal action of the mayor or board of commissioners,
which have been or shall be created for the purpose of serving in an advisory capacity,
and which are not official-line departments of the town under existing law, shall
expire one year from the date of passage of an ordinance creating such a board, commission,
committee, or agency, or one year from appointment by the mayor or board of commissioners.