This contract represents the complete agreement between parties and supersedes any and all prior agreements, understandings, customs, and practices. This Agreement incorporates the entire understanding of the parties on all matters which were or could have been the subject of negotiation. During the term of this Agreement, neither party will be required to negotiate with respect to any such matters, whether or not covered by this Agreement and whether or not within the knowledge or contemplation of either or both of the parties at the time they negotiated or signed this Agreement. This Agreement may be amended, modified, or supplemented only by a written document signed by authorized representatives of both parties. This specific language will not result in the denial of any current economic benefit enjoyed uniformly by bargaining unit employees without negotiations of the parties.