99.330.  Authority may be created, when. — There is hereby created in each community (as herein defined) a public body corporate and politic, to be known as the "Land Clearance for Redevelopment Authority" of the community; provided, however:

  (1)  That such authority shall not transact any business or exercise its powers hereunder until or unless the governing body shall approve (by resolution or ordinance as herein provided) the exercise in such community of the powers, functions and duties of an authority under this law; and provided further that, if it deems such action to be in the public interest, the governing body may, instead of such resolution or ordinance adopt a resolution or ordinance approving the exercise of such powers, functions and duties by the community itself or by the housing authority, if one exists or is subsequently established in the community, and in such event, the community or housing authority, as the case may be, shall be vested with all the powers, functions, rights, duties and privileges of a land clearance for redevelopment authority under this law;

  (2)  The governing body of a community shall not adopt a resolution or ordinance pursuant to subdivision (1) above unless it finds:

  (a)  That one or more blighted, or insanitary areas (as herein defined) exist in such community, and

  (b)  That the redevelopment of such area or areas is necessary in the interest of the public health, safety, morals or welfare of the residents of such community.