Taken together, the government argued that it could track a cellphone's location without having to show probable cause.

WSJ: Judges Challenge Phone Location Tracking

The bill would update ECPA so the government must demonstrate probable cause to a judge before it may demand either the present or past location data about a person.

FORBES: Lawmakers Propose Changes To Make Government Get Warrant Before Reading Your Email

It must have a reasonable belief that a crime has been committed and evidence of probable cause that records or other evidence of the crime will be found at the location desired to be searched.

FORBES: Can The IRS Access Your Emails?