Sec. 4.

Development plans and approval thereof.

1. A development plan shall contain:

(a) A metes and bounds or a statement of the boundaries by streets, or other reasonably definite legal description of the redevelopment area;

(b) A statement of the various stages, if more than 1 stage is intended, by which the development is proposed to be constructed or undertaken, and the estimated time within which each stage is to be completed. The initial stage of the redevelopment plan shall be stated in reasonable detail. Subsequent stages shall be stated by brief general description in the original redevelopment plan, and in reasonable detail in amendments to the redevelopment plan made pursuant to subsection 5 of this section;

(c) A provision for all reasonable costs of relocating persons displaced during the completion of a stage of the redevelopment plan in decent, safe and sanitary dwellings adequate to their needs and within their financial means in reasonably convenient locations not less desirable than the development area with respect to utilities and facilities;

(d) Each redevelopment plan or stage thereof presented for approval shall contain such of the following items relevant to the proposed plan or stage;

(i) A description of the existing buildings or improvements in the development area, to be demolished immediately, if any;

(ii) A description of existing buildings or improvements, in the development area not to be demolished immediately, if any, and the approximate period of time during which the demolition, if any, of each such building or improvement is to take place;

(iii) A description of the proposed improvements, if any, to each building not to be demolished immediately, any proposed repairs or alterations to such building, and the approximate period of time during which such improvements, repairs or alterations are to be made;

(iv) A description of the type, number and character of each new industrial, commercial, residential or other building or improvement to be erected or made;

(v) A description of those portions, if any, of the development area which may be permitted or will be required to be left as open space, the use to which each such open space is to be put, the period of time each such open space will be required to remain an open space and the manner in which it will be improved and maintained, if at all;

(vi) A description of those portions, if any, of the development area which the redevelopment corporation proposes to sell, donate, exchange or lease to, with or from the city, and an outline of the terms of such proposed sale, donation, exchange or lease;

(vii) A statement of the proposed changes, if any, in zoning ordinances or maps, necessary or desirable for the development and its protection against blighting influences;

(viii) A description of the proposed changes, if any, in streets or street levels and any proposed street closings;

(ix) Reasonable estimates of the character of the existing dwelling accommodations, if any, in the area covered by the redevelopment plan or stage, the approximate number of families residing therein, the rentals being paid by them, the vacancies in such accommodations and of the rental demand therefor;

(x) A statement of the character, approximate number of units, approximate rentals and approximate date of availability of the proposed dwelling accommodations, if any, to be furnished during construction and upon completion of the development;

(xi) A statement of the proposed method of financing the redevelopment or stage, in sufficient detail to evidence the probability that the redevelopment corporation will be able to finance or arrange to finance the development;

(e) A statement of persons who it is proposed will be active in or associated with the management of the redevelopment corporation during a period of at least 1 year from the date of the approval of the development plan.

The development plan, and any application to the planning commission or supervising agency for approval thereof, may contain in addition such other statements or materials as may be deemed relevant by the proposer thereof, including limits on the amounts which may be paid as compensation for services to the officers and employees of the redevelopment corporation, suggestions for the clearance, replanning, reconstruction or rehabilitation of 1 or more areas which may be larger than the development area but which include it, and any other provisions for the redevelopment of such area or areas.

(f) A description of the means through which a representative council of residents of the redevelopment area shall be established and consulted throughout all stages of the planning of the redevelopment so that the desires of residents shall be incorporated into the plans for the area to the extent feasible.

(g) A description of the means through which, to the extent feasible, the housing to be developed shall reasonably be within the financial means of the residents of the general area.

(h) A description of the means through which persons displaced by the redevelopment shall have priority in occupying any new housing in the redevelopment area, if they meet reasonable requirements of responsibility.

2. No development shall be initiated until certificates of approval of the development plan therefor shall have been issued by both the planning commission and the supervising agency.

3. A planning commission may approve a development plan, but no certificate of approval thereof shall be issued by it unless and until an application for approval has been filed with it, together with the development plan, and unless and until the planning commission shall determine:

(a) That the area within which the development area is included is substandard or insanitary or is polluted or neglected and that the redevelopment of the development area in accordance with the development plan is necessary or advisable to effectuate the public purposes declared in section 2;

(b) That the development plan is in accord with the master plan, or city map, if any, of the city;

(c) That the development area is of sufficient size to allow its redevelopment in an efficient and economically satisfactory manner;

(d) That the various stages, if any, by which the development is proposed to be constructed or undertaken, as stated in the development plan, are practicable and in the public interest;

(e) That public facilities, including, but not limited to school, fire, police, transportation, park, playground and recreation, are presently adequate, or will be adequate, at the time that the development is ready for use, to service the development area;

(f) That the proposed changes, if any, in zoning ordinances or maps and in streets and street levels, or any proposed street closings, are necessary or desirable for the development and its protection against blighting influences and for the city as a whole;

(g) Upon data submitted by or on behalf of the redevelopment corporation, or upon data otherwise available to the planning commission, that there will be available for occupation by families, if any, then occupying dwelling accommodations in the development area similar accommodations at substantially similar rentals in the development area or elsewhere in a suitable location in the city, and that the carrying into effect of the development plan will not cause undue hardship to such families.

Any such determination shall be conclusive evidence of the facts so determined except upon proof of fraud or wilful misfeasance. In arriving at such determination, the planning commission shall consider only those elements of the development plan relevant to such determination under subparagraphs (a) through (g) of this paragraph 3 of section 4 and to the type of development which is physically desirable for the development area concerned from a city planning viewpoint, and from a neighborhood unit viewpoint if the development plan provides that the development area is to be primarily residential. Upon approval of a development plan by the planning commission, it sh