Later , gives a brief introduction on the common law system represented by britain and the continental law system represented by germany and analyzes the present situation of the academic study in the effect of contracts and raises some problems in it 随后对以英国为代表的英美法系和以法国为代表的大陆法系关于合同效力的立法概况进行了简介，并分析了合同效力问题理论研究的现状，指出了其存在的问题。
The paper tries inquiring into how to uphold the validity of the building contract , how to calculate the cost of the structure referred to in the contract accurately , how to guarantee the contractor ' s priority of compensation and other major hot issues 本文拟对审判实践中如何正确认定建设工程施工合同效力，如何正确确定建设工程施工合同的工程造价和如何保障承包人优先受偿权等难点热点问题进行探讨。
Because counter party is always put at a disadvantage , they should get the opportunity to review during the making process of e - contract . they also should be offered the manifesting assent right . these are the key point to confirm the effectiveness of e - format contract 由于相对人处于弱势地位，在合同的订立中应注意使相对人具有适当预先审查的机会，以及必经的明示同意程序权，这是确定电子格式合同效力的关键。
Clause 3 in determining the validity of a contract formed before the operative date of the contract law , if application of the law in effect at the time leads to its invalidation , but application of the contract law leads to affirmation of its validity , the people ' s court shall apply the contract law 第三条人民法院确认合同效力时，对合同法实施以前成立的合同，适用当时的法律合同无效而适用合同法合同有效的，则适用合同法。
This dissertation studies the deeper meaning of the effect of definition , source and the content of contracts , from the aspect of the basic theory of laws , and demonstrate the similarities and differences of the forming , effect and its taking effect in contracts 本文首先对合同效力的内涵进行了探讨，主要是从法理学的角度对合同效力的含义、渊源及内容进行了深入的分析，着重论证了合同成立与合同有效、生效的联系与区别。
To prevent both sides long procrastinate not definitely , make insurance contract effectiveness is in not certain state , insurance law returns a regulation , the both sides inside two years did not come to an agreement since the day from contract effectiveness break down , the underwriter has authority to remove contract 为了防止双方久拖不决，使保险合同效力处于不确定状态，保险法还规定，自合同效力中止之日起两年内双方未达成协议的，保险人有权解除合同。
The former includes the definition of terms such as " executory contract " and " rescission of contract " , and the latter mainly focuses on the particularity of the trustee ' s dealing with executory contracts in the condition of adjudication of bankruptcy , and on the legal theory basis of this special legal institution 基本概念的界定，如“待履行合同” 、 “合同解除”的内涵。破产宣告对于待履行合同效力的法理基础，则主要探讨破产情形下合同解除的独特性质及采取不同法律设置的法理根据。
The writer thinks : one concept should be use to express the various statuses of validity of contract brought from rescinding contract in part or whole ; at first , the right to decide whether to restore the original status belongs to parties of contract , then it belongs to judge or arbitrator , however , when decided , they should be bound by following actors : performance and character of contract , provisions in law , dealing security of a third , opinions of superior department , purpose of system of rescinding contract and principles of fairness and benefit , etc 本文认为，应使用“合同解除”一个概念表述合同效力部分或全部消灭的各种形态；合同解除是否溯及既往，首先是当事人的权利，其次是载判者的权力，但无论如何，都应受到如下因素的限制，即合同性质、履行状态、法律规定、第三人的交易安全、主管部门的意见、合同解除的规范目的和公平与效率原则等。
Accordingly , insurance code is decided , in policy - holder not agreement of according to contract pays current insurance premium , and exceed insurance code 60 days when decide to still did not pay insurance premium to bring about contract effectiveness break down , classics underwriter and insure person talk things over and come to an agreement , fill in policy - holder after paying insurance premium , contract effectiveness restores 因此，保险法规定，在投保人未依照合同约定支付当期保险费，且超过保险法规定的60日仍未支付保险费导致合同效力中止的，经保险人与投保险人协商并达成协议，在投保人补交保险费后，合同效力恢复。
Second , there should be improvements in article 68 and 108 of contract law in order to reduce reduncy and conflicts . third , there should be limitation on the creditor ' s right to refuse to recoqnize the other party ' s anticipatoty breach so as to avoid and prevent abusing his right by insisting on the validity of contract 二是将《合同法》第68条、第108条进行改造，消除其重合和不协调.三是时债权人拒绝承认预期违约的选择权加以限制，以进免和防止债权人任意坚持合同效力而滥用预期违约的救济权
