The Municipal Council may, from time to time, amend, supplement, change, modify, or repeal this chapter by proceeding in accordance with the regulations of this article. The Municipal Council shall, by resolution adopted at a regular or special meeting, fix the time and place of a public hearing on the proposed amendment and cause public notice thereof to be given as follows:
1. 
By publishing a notice thereof once each week for two successive weeks in a newspaper of general circulation within Norristown. The first notice shall not be more than 30 days or less than seven days from the date of the hearing.
2. 
The notice shall state the time and place of the hearing, the general nature of the proposed amendment and that full opportunity to be heard will be given to any citizen and all parties with an interest in attending such hearing.
3. 
Whenever a proposed amendment affects a particular property, there shall be posted upon said property or premises, at such place or places as the Municipal Council may direct, notice of said proposed amendment.
All proposed amendments, before adoption, shall be referred to the Municipality and Montgomery County Planning Commission at least 30 days prior to the public hearing for recommendation and report, which shall be advisory.
Should any section of this chapter be declared to be invalid by a court of competent jurisdiction, such decision shall not affect the validity of the chapter as a whole or any other part thereof.
All ordinances and parts of ordinances inconsistent herewith are repealed upon the legally effective date of this chapter.