1. When the governing body of a municipality adopts a resolution or ordinance as aforesaid, it shall promptly notify the mayor of such adoption. If the resolution or ordinance adopted is one approving the exercise of powers hereunder by a land clearance for redevelopment authority, the mayor shall appoint a board of commissioners of such authority which shall consist of five commissioners, and when the governing body of a county adopts such a resolution, said body shall appoint a board of commissioners of the authority created for such county which shall consist of five commissioners.

2. All commissioners of an authority shall be taxpayers who have resided for a period of five years in, in the case of a municipality, the area within the municipality; and, in the case of a county, the area within the county.

3. Two of the commissioners who are first appointed shall be designated to serve for terms of one year from the date of their appointment and three shall be designated to serve for terms of two, three and four years respectively from the date of their appointment. Thereafter, commissioners shall be appointed as aforesaid for a term of office for four years except that all vacancies shall be filled for the unexpired term.