To meet a public emergency affecting health, safety, morals, or the public welfare, or a special emergency in the operation of a Municipal department or agency, the Council may adopt emergency ordinances and resolutions, but such ordinances and resolutions may not: levy taxes, except when incidental to incurring debt; grant, renew, or extend a franchise, except one affecting health and a franchise given in connection with the issuance of debt obligations; regulate the rate charged by any public utility for its services; or grant any special privileges. An emergency ordinance or resolution shall be introduced in the form and manner prescribed for ordinances or resolutions generally, except that it shall be plainly designated as an emergency ordinance or resolution and shall contain in the preamble or after the enacting clause, a declaration stating that an emergency exists and describing it in clear and specific terms. A proposed emergency ordinance or resolution may be adopted with or without amendment or rejected at the meeting at which it is introduced, but the affirmative vote of at least five (5) members of Council shall be required for adoption. After its adoption the ordinance or resolution shall be published as prescribed for other adopted ordinances or resolutions but it shall become effective immediately upon its adoption unless a later date is specified therein.