The City Solicitor shall draft all bonds, obligations, contracts, deeds, leases, conveyances, and other legal instruments that may be required of him by any ordinance or order of the Board of Mayor and Aldermen or which by any such ordinance or order is requisite and necessary to be done and made between the city and any person contracting with the city, and which by law, usage, or agreement the city is to be at the expense of drawing.
('71 Code, § 2-38)