By Michael Maharrey Tomorrow, a Montana law that limits the use of Automated License Plate Readers (ALPRs) in the state goes into effect. The new law will also place significant roadblocks in the way of a federal program using states to help track the location of millions of everyday people through pictures of their license plates. Rep. Daniel Zolnikov (R-Billings) sponsored House Bill 149 (HB149). The legislation prohibits the use of ALPRs except for specified purposes, and also places limitations on the retention and sharing of data gathered by license plate readers. The Montana Senate passed HB149 by a 48-1 vote.