It is further found and declared:
(1) that certain of such blighted areas or portions thereof may require acquisition, clearance, and disposition subject to use restrictions as provided in this part, since the prevailing condition of decay may make impracticable the reclamation of the area by rehabilitation;
(2) that other areas or portions thereof may, through the means provided in this part, be susceptible of rehabilitation in such a manner that the conditions and evils enumerated in 7-15-4202 may be eliminated, remedied, or prevented; and
(3) that to the extent feasible salvable blighted areas should be rehabilitated through voluntary action and the regulatory process.