For the purpose of this subtitle, the following words have the meanings indicated unless their context clearly indicates otherwise. “City” means Mayor and City Council of Baltimore, the body politic and corporate as established by <cite data-doc="City of Baltimore, Md., Charter">the Baltimore City Charter</cite>. “Construction estimate” means that document signed by the contractor, the inspector, the proper division and bureau chief, and the Director of Public Works, the Director of General Services, or the Director of Transportation, whichever has jurisdiction, certifying that certain work has been completed on a construction contract. “Contractor” means any person having a contract with the City. “Contractor” does not include employees with labor contracts. “Director” means the Director of Finance. “Payment date” means the date of the Director’s check. “Proper invoice” means an invoice which contains the contractor’s federal Employer’s Identification Number or Social Security Number and the contract or purchase order number or other description of the contract and which contains or is accompanied by such substantiating information and documentation as required by the Director. “Receipt date” means the date that a proper invoice and receiving notice or, in the case of a construction contract, a proper construction estimate is received and recorded by the Bureau of Payroll and Disbursements. City Code, 1976/83, art. 1, §27A(a) Ord. 89-280 Ord. 15-435 Ord. 22-125