Relating to privacy.

Modifies definitions of "pen registers" and "trap and trace devices." Authorizes law enforcement agency to install pen register or trap and trace device without warrant or court order in certain circumstances. Prohibits law enforcement agency from obtaining personal electronic data of electronic communication device without warrant except in certain circumstances. Prohibits law enforcement agency from obtaining historical location data of electronic communication device without warrant or court order except in certain circumstances. Prohibits law enforcement agency from obtaining subscriber information or transactional information of electronic communication device without subpoena, warrant or court order except in certain circumstances. Establishes procedures for application by peace officer for court order to obtain historical location data, subscriber information or transactional information of electronic communication device. Authorizes court to issue order. Specifies time limits for preservation of information obtained by law enforcement agency. Modifies crimes for which law enforcement agency may obtain warrant to install mobile tracking device. Authorizes law enforcement agency to install mobile tracking device without warrant in certain circumstances. Requires that application for warrant to install mobile tracking device be authorized by certain persons.