似乎EO公布之后，要求30天的Federal Register公示。。。
是不是就是说，即使O8明天宣布，过了30天，也只能明年开始实施了？
Thirty days after being published in the Federal Register, executive orders
take effect. While they do bypass the U.S. Congress and the standard
legislative law making process , no part of an executive order may direct
the agencies to conduct illegal or unconstitutional activities. http://usgovinfo.about.com/od/thepresidentandcabinet/a/Presiden
