term of validity

基本解釋

The term of validity of identification papers or residence certificates shall be determined according to the purposes of entry.
身份證件或者居留證件的有效期限，根據(jù)入境的事由確定。
The term of validity of the present treaty is twenty years.
本條約有效期為二十年。
www.fmprc.gov.cn
having the serial number, date of approval and the term of validity of the production licence in case of a product manufactured under the production licence system;
實(shí)行生產(chǎn)許可證制度的產(chǎn)品，要有許可證編號(hào)、批準(zhǔn)日期和有效期限；

Although critics generally accept the long-term validity of ratings, there has been vociferous criticism of the agencies' short-term performance.
ECONOMIST: Credit-rating agencies
One of the arguments, that keeping a lid on long-term rates will get the housing market back on its feet, is of questionable validity.
FORBES: Federal Reserve Delivers $46B Of First-Half Profit To U.S. Treasury