Nothing in this Article shall be deemed or construed as preventing the Council, or a board of commissioners in the case of those departments having control of their own revenues and funds, from entering into contracts for the performance of work when it is determined by the Council or the board of commissioners that the work can be performed more economically or feasibly by independent contractors than by City employees. The authority of the Council set forth in this section may be delegated to departments and officers of the City under rules and procedures as the Council may prescribe. Nothing in this section shall limit the application of Sections 370 through 373 of the Charter relating to contracts and competitive bidding for contracts.