Except where a pressing public emergency makes complying with this provision dangerous to the public health, safety or morals, and by affirmative vote of two thirds of the members elected to Council, and where the ordinance sets out in full the nature of the emergency, a proposed ordinance shall be read by title at not less than two meetings of Council with at least one week intervening between each meeting, unless a member of Council demands that the ordinance shall be read in full at one or both meetings. If such a demand is made, the ordinance shall be read in full as demanded. No ordinance shall contain more than one subject, which shall be clearly expressed in its title, and no ordinance shall be revived or amended unless the new ordinance contains the entire ordinance revived, or the section or sections amended, and the section or sections so amended shall be repealed. Council may adopt codification ordinances, codifying, revising and rearranging the ordinances of the City or any portion of such ordinances. Every ordinance and resolution of Council shall be recorded in the office of the City Clerk, and shall be a public record. The Clerk shall prepare and keep a full and proper index of all ordinances, as well as separate indices of other proceedings of Council.