It shall be the duty of the head of every City department or bureau established by <cite data-doc="City of Baltimore, Md., Charter">the Baltimore City Charter</cite> or by ordinance to provide all technical materials, plats, drawings, and information that are requested by any member or the President of the City Council for the purpose of introducing legislation into the Council. City Code, 1976/83, art. 1, §6 Ord. 76-080