Except as otherwise provided in this chapter, any amendment to this title shall be initiated and adopted as other ordinances are amended or adopted.

Any amendment to this chapter which changes any property from one district to another district, or imposes any regulation upon property not theretofore imposed, or removes or modifies any such regulation, shall be initiated and adopted as hereinafter set forth in this chapter.

Any amendment of the nature specified in Section 17.66.020 may be initiated by:

The receipt of a petition or resolution of intention of amendment, the planning commission shall set a date for a public hearing thereon, but not later than forty-five days after the receipt of the petition or resolution.

If the proposed amendment consists of a change in the boundaries of any district, the planning commission shall give notice of the time and place of such hearing, and the purpose thereof, in the manner designated in Section 17.66.040. If the proposed amendment is of a matter of general or city-wide scope, notice thereof shall be given as provided in Section 17.68.030.

After the close of the public hearing or continuations thereof, the planning commission shall make a report of its findings and its recommendation with respect to the proposed amendment. The commission report shall include a list of persons who testified at the hearing, a summary of the facts adduced at the hearing, the findings of the commission, and copies of any maps or other data and/or documentary evidence submitted in connection with the proposed amendment. Copy of such report and recommendation shall be transmitted to the city council within ninety days after the first notice of hearing thereon; provided however, that such time may be extended with the consent of the city council or the petitioner for such amendment. In the event the planning commission fails to report to the city council within the aforesaid ninety days or within the agreed extension of time, the amendment shall be deemed approved by the planning commission. The recommendations of the planning commission on proposed amendments shall be adopted by a majority vote of the voting members of the planning commission.

Upon receipt of the recommendation of the planning commission or expiration of the aforesaid ninety days or agreed upon extended period, the city council shall hold a public hearing thereon, giving notice thereof as provided in Chapter 17.68. After the conclusion of such hearing the city council may, within one year, adopt the proposed amendment or any part thereof set forth in the petition or resolution of intention in such form as the council deems desirable.