After April 17, 1973, no such agreement, understanding or policy shall be valid or effective unless specifically approved by the City Council following public hearings on the same as hereinafter provided. All terms and conditions of such agreements, understanding or policies shall be reduced to writing and presented to the City Council for approval by the Berkeley Police Department or appropriate City official, accompanied by a statement of the rationale therefor, projections of the costs of implementation, and other information or explanations requested by the council. (Ord. 4640-NS § 3, 1973)