CalECPA provides that a warrant is required for a great variety of digital searches and seizures by law enforcement agencies and similar bodies.
Read California Now Has the Nation's Best Digital Privacy Law in an article by Kim Zetter at WIRED, who writes:
"The landmark Electronic Communications Privacy Act bars any state law enforcement agency or other investigative entity from compelling a business to turn over any metadata or digital communications—including emails, texts, documents stored in the cloud—without a warrant. It also requires a warrant to track the location of electronic devices like mobile phones, or to search them.
The legislation, which easily passed the Legislature last month, is the most comprehensive in the country, says the ACLU."Read the article here.