There isn&#x27;t a valid warrant in this case though: instead there&#x27;s a writ (aka an order by the government) under the All Writs Act. This act allows the government to compel a person&#x2F;company to do something when there isn&#x27;t any specific law on the books for that particular situation.<p>However, the writ in question is to compel Apple to write a new version of the OS (not to hand over keys, not to hand over data in their possession, not to provide technical support to the FBI - all of which are things Apple has done when presented with a valid warrant).<p>From Apple&#x27;s motion to vacate:<p>&quot;In the section of CALEA entitled “Design of features and systems configurations,” 47 U.S.C. § 1002(b)(1), the statute says that it “does not authorize any law enforcement agency or officer —<p>(1) to require any specific design of equipment, facilities, services, features, or system configurations to be adopted by any provider of a wire or electronic communication service, any manufacturer of telecommunications equipment, or any provider of telecommunications support services.<p>(2) to prohibit the adoption of any equipment, facility, service, or feature by any provider of a wire or electronic communication service, any manufacturer of telecommunications equipment, or any provider of telecommunications support services.&quot;<p>So the writ appears to be in direct contradiction to other law, which would make it an invalid use of the All Writs Act.