915 个回答
不得不说知乎真都如此拉跨，几千个回答都不去扒拉原文。
这法案原文的乐子可大了去了。居然没有一个人扒拉么？
首先是当头一棒
To protect the national security of the United States from the threat posed by foreign adversary controlled applications, such as TikTok and any successor application or service and any other application or service developed or provided by ByteDance Ltd. or an entity under the control of ByteDance Ltd.
首先抖音和字节跳动相关业务只是这条法案的“such as”实际上这条法案针对的是“ foreign adversary ”即来自中俄伊朝的全部应用软件。也就是说这条法案不止针对抖音，它是提供了一个政策框架，这一政策框架可以扫射所有来自中俄伊朝的软件应用，抖音只是被拉出来的典型，按照法案赋予美国政府的权力，不论原神还是俄罗斯原神都在扫射范围之内。在未来只要经过美国政府认定即可以引用这条法案对任何来自美国定义下的竞争对手国家软件产品进行打击。
接着来到第二条
2.a.1:(1)PROHIBITION OF FOREIGN ADVERSARY CONTROLLED APPLICATIONS.—It shall be unlawful for an entity to distribute, maintain, or update (or enable the distribution, maintenance, or updating of) a foreign adversary controlled application by carrying out, within the land or maritime borders of the United States, any of the following:
这一条是标准套话，禁止下载更新维护，重点在限制范围：即美国物理边界以内。那么美国国内用户即使挂梯子下载也会被包含在该法案以内。实质就是行政性GFW，我们都知道GFW原理是通过网络攻击迫使服务供应者对攻击源ip进行封锁，而7521法案一旦通过，就是通过强制罚款来实现锁区目的。
2.a.1.B：(B) Providing internet hosting services to enable the distribution, maintenance, or updating of such foreign adversary controlled application for users within the land or maritime borders of the United States.
internet hosting services：互联网托管服务，把数据内容放在第三方服务器上，所以架海外服务器也寄了，根据下一条，实际上这个流程只要申报，经过国会判定符合外国对手控制标准就会被纳入法案扫射范围。
c条目是豁免，但是豁免要求剥离外国控制（它明明可以直接抢，居然要立法，为美利坚法治精神点赞）
d条是处罚手段，即罚款，美国境内每有一个用户罚5000刀。
当然美国人法律都是很严谨的，这里有明确的外国竞争对手控制的标准：
(g) Definitions.—In this section:
(1) CONTROLLED BY A FOREIGN ADVERSARY.—The term “controlled by a foreign adversary” means, with respect to a covered company or other entity, that such company or other entity is—
(A) a foreign person that is domiciled in, is headquartered in, has its principal place of business in, or is organized under the laws of a foreign adversary country;
(B) an entity with respect to which a foreign person or combination of foreign persons described in subparagraph (A) directly or indirectly own at least a 20 percent stake; or
(C) a person subject to the direction or control of a foreign person or entity described in subparagraph (A) or (B).
外籍人员掌握（必须脱籍）、总部在外国（总部搬迁）、由外国法案授权组织（国企）
控股标准是20%以上（成吉思汗：你赶紧把车轮竖起来）
后面就是技术性定义了，之前几条理解错了，禁止的是VPS，另外单纯发评论是可以的。
