Inasmuch as a contract is a legal document attesting to the terms of an agreement providing for an exchange of services for a mutually agreed-upon compensation in return, each separate deletion, modification, or addition shall be completed in writing, signed by authorized representatives of the contractor and the City, and filed with the City Clerk within thirty (30) calendar days.

Any willful abridgement of any provision of a contract, without a written memorandum as required above, shall be considered a breach of contract and a misdemeanor.