Both chambers have rejected provision requiring search warrant, a key provision pushed by privacy advocates.

The Senate passed a measure on Tuesday that would enhance the regulation of cell-phone tracking devices currently used by at least two law enforcement organizations in the state. The Senate version, however, was amended at the last minute to weaken the legal standard allowing only limited access to citizens' location information, according to privacy advocates

A key question remaining is whether police should be required to obtain a search warrant before deploying a Kingfish, Stingray or other such device in a criminal investigation.