有效期 (Term) 条款通常规定合同的有效期限，何时生效及到何时结束，合同结束后必要时如何延展等等。　

以下为“Term”条款的常用表达方式：

The term of this contract is for a _____ year period.合同的有效期为_____年。

如：

1. The term of this contract is for a one (1) year period.

2. The contract is for a _____ month period, commencing _____.

合同的有效期为_____月，开始于______。（期限）

a. The contract is for a 12 month period, commencing September 17, 2002 thru September 16, 2003.

b. The contract is for a 6 month period, commencing 4-1-03 and ending 9-30-2003.

3. This agreement remains valid for _____ year(s), i.e. commencing on ______, _____and terminating on ______, _____.

本协议在_____年之内有效，即从_____年_____月_____日起生效，_____年_____月_____日起到期。　

4. The contract term is hereby extended for the period____.

合同的有效期为_______。

如：The contract term is hereby extended for the period____ in accordance with Section E, Paragraph 10, Term of Contract and Contract Extension.　

Term条款除了规定合同的期限外，通常另外合同期限的延展“Extension”。

1. The contract period is for _____ year with option to re-new for _____ year.

合同有效期为_____年，同时可以选择延长_____年。　

2. The contract is for a _____ month period, commencing _____. The contract may be renewed for up to _____ year option periods.

合同的有效期为_____月，开始于_______，同时可以选择延长_____年。

3. This agreement shall commence on the commencement date and shall endure for a continuous period of _____ years. Thereafter it will be automatically renewed for successive periods of _____ years on the same terms and conditions unless one of the parties had given _____days notice of termination.

本协议应自生效日生效并在_____年内有效。此后，除非一方当事人提前_____天书面通知对方当事人终止本协议，本协议有效期自动延长_____年，协议条款不变。　

Term条款并没有十分固定的表达方式，以下即是一些合同中Term的实例：

1. This Agreement shall be valid and remain in force for a period of three (3) years commencing from the date appearing first above written upon the signing of both Party A and Party B and shall be extended for another period of three (3) years on the same terms and conditions unless either of the parties hereto gives the other party at least thirty (30) days prior written notice to terminate this Agreement prior to the expiration of the original term.

本合约须从上面首次写明的甲方和乙方签订本约的日期起生效并保持效力三年，并将按同样条件延长三年，否则与约任何一方至少须在原定时间期满前三十天给予另一方提前终止本合约的书面通知。

2. At any time and from time to time during the period commencing on the date hereof and terminating on ______, 20___, party A may in writing advise party B.

自本协议签订之日起到______年______月协议终止这段期间内，甲方可随时以书面形式通知乙方。

3. The term of this Agreement shall be three years from the effective date, unless terminated in accordance with Article VI- (3) and Article IX.

本合同的期限除非根据第8条第3款及第9条的规定终止外，有效期为3年。　

4. The contract is valid from _______ until _______.

The contract period is automatically extended for any leave of absence allowed for in law.

合同的有效期为从______到_____。

5. The term of this Agreement shall commence on the _____ day of _____ and end on the _____ day of _____ Upon expiration of the above initial term, this Agreement shall automatically be renew and extended for a like period of time unless terminated in writing by either party _____ days prior to the date for such renewal.

本协议期限为__年____月____日至__年___月___日。除非续订日前_____天一方以书面方式提出终止，否则上述首期届满后，协议应自动续订，延长时间与前期相同。