All powers of the City permitted by this Revised Charter, the Constitution, and the laws of the State of Ohio, shall be vested in Council. Council shall provide for the exercise of all City powers and for the performance of all duties and obligations imposed on the City by law, through the adoption of legislation. Without limitation of the foregoing, Council shall have the power to:
(a) establish or authorize the number of positions in the various departments, divisions, offices, bureaus, boards, commissions and committees of the City and to adopt a wage, salary and benefit structure for all positions within the classified and unclassified service;
(b) create, combine, change and abolish departments, divisions, offices, bureaus, boards, commissions and committees not specifically created by this Revised Charter;
(c) provide for an independent audit of the accounts and records of the City, which may be in addition to audits by State offices and agencies as may be required under the laws of the State of Ohio; and
(d) conduct inquiries and investigations regarding the affairs of the City and the conduct of any City department, office or agency and for this purpose subpoena witnesses, administer oaths, take testimony, and require the production of evidence.