The Council shall by ordinance make provision for:
(a) The form and method of enactment of its ordinances and adoption of its resolutions;
(b) The procedure for making public improvements and levying assessments, including the procedure for combining two or more public improvements, and the levying of assessments therefore, in one proceeding if the Council finds that it will be economical and practical to undertake such improvements jointly;
(c) The advertising and awarding of contracts;
(d) Such other general regulations as the Council may deem necessary, including regulations as to the custody and use by the Clerk of Council of an official seal.