Each emergency ordinance or resolution shall determine that said ordinance or resolution is necessary for the immediate preservation of the public peace, health, safety, or welfare, and shall contain a statement of the necessity for such emergency. No ordinance or resolution pertaining to the following matters may be adopted as an emergency measure: zoning classifications, districts or regulations; regulations governing the platting and subdivision of land; the levying of a tax or the incurring of a debt to be evidenced by bonds or notes, unless such tax or debt shall be necessary to provide or replace municipal facilities, equipment or buildings and the need for such facilities, equipment or buildings arises out of a public exigency; or the changing of salaries of members of Council or the Mayor.