Contracts can be complicated. Here are three tools you can use to make them simpler and more manageable.This agreement (including any exhibits and schedules hereto) constitutes the entire agreement among the parties hereto. Exhibit A also gives the parties a checklist of other extended and optional coverages that the owner should consider. An addendum to a contract is essentially an update to an original agreement. They're typically included alongside a contract as an extra document. Many contracts contain one or more schedules, annexes or exhibits. The naming style – exhibit, schedule, attachment, appendix or annex – is not of significance. Furthermore,. Contractor is free to contract with other parties for the duration of the contract. "Exhibit" means a document, referred to in a contract, which is attached and establishes requirements for deliverables.