http://www.supremecourt.gov/opinions/17pdf/16-402_h315.pdf
USSC ruled in Carpenter that the government needs a warrant for CSLI. there are some narrow instances where it wouldn't require a warrant, but generally speaking, if you want location information you need a warrant.
that entire ACLU page you linked is outdated as of june 2018.
Edited by blake1771 at 10:52:03 on 03/30/20