生效日期
effective date
(1)一般義：一項協議生效的日期。(2)証券義：指在証券交易委員會注冊的証券可能開始發行的日期，一般在填寫登記表20天后。
Date of entry into force of an agreement: (1) general meaning. (2) Securities meaning: refers to the date of SEC-registered securities may be issued at the beginning, usually in 20 days to fill in the registration form.