Every contract modification, change order or contract price adjustment under a contract with the Town shall be subject to prior written certification by the Town Manager as to the effect of the contract modification, change order or adjustment in contract price on the total project budget or the total contract budget. In the event that the certification discloses a resulting increase in the total project budget and/or the total contract budget, the department head shall not execute or make such contract modification, change order or adjustment in contract price unless sufficient funds are avail-able therefor, or the scope of the project or contract is adjusted so as to permit the degree of completion that is feasible within the total project budget and/or total contract budget as it existed prior to the contract modification, change order or adjustment in contract price under consideration. (Prior code 17.03.170)