A contract contract is a really important document that defines your work volume and binds the owner to your services, including payment terms. It is really important that you understand the extent of the work indicated in the contract agreement, that you finish the work as planned and that you finish the invoice by instruction, and finally, it will be the tool that will be used so that you can get paid. In costs plus percentage, the owner pays more than 100 percent of the documented costs, which usually requires a detailed billing of costs.  In this type of contract, the actual costs of labour are paid to the contractor, plus a certain percentage as a profit. Different contractual documents, subscriptions, specifications are not required at the time of signing the agreement. The contractor must keep all records relating to the costs of the equipment and work and the contractor is paid accordingly to the responsible engineer. This type of contract is suitable for emergency work such as difficulties in foundation conditions, construction of expensive structures, etc. The U.S. Federal Acquisition Regulations expressly prohibit the use of this type for U.S. federal government contracts.
 Project Manual – Written documents prepared or made available for the acquisition and construction of the plant, including, but not limited to tender documents or other contract documents, geographic and existing conditions, agreement, loan forms, terms and conditions, conditions and additional specifications. The content of the project manual can be linked in one or more volumes. A court may consider other construction or interpretation canons if it finds that the contractual terms are ambiguous. In commercial situations, the court may take into account business developments or performance, i.e. the behaviour observed in previous transactions between the parties. Such evidence may assist the court in determining the intent of the parties at the time of the contract and provide additional conditions that the court, although not expressly included in the agreement, may use to interpret the contract. Therefore, where one party asserts that the other party breached the contract by not making the payment properly and the contract does not contain explicit payment provisions, the Tribunal may consider how the parties end the issue of payment in previous transactions in order to resolve the issue (AROK Construction Co./Indian Construction Services, 174, ariz. 291 , 848 S.2d 870 [Ariz. Circa 1993). When considering a statute, a court applies the building rules only if the language in the statutes is ambiguous. Under the “simple” rule, if Parliament`s intention is “so obvious from a status point of view that it cannot be questioned of its importance, it is not necessary for the court to apply construction guns” (Overseas Education Ass`n v. Federal Labor Relations Authority, 876 F.2d 960 [D.C.
Cir. 1989]). Therefore, before even considering the canons to be applied, the Tribunal must first determine whether the status in question is ambiguous. Courts have generally held that a status is ambiguous if reasonably well-informed persons could understand the language in two directions or more (State ex rel. Neelen v. Lucas, 24 Wis. 2d 262, 128 N.W.2d 425 ). This type of construction contract is an alternative to fixed contracts. It allows flexibility and transparency for the owner and reduces the risk for a contractor, because a Cost Plus construction contract guarantees them a profit.
In the case of a statute, certain construction cannons may help a court determine what the authors of the statute – usually congress or state legislative power – mean by the language used in the law.