New York State Vehicle and Traffic Law:

Section 397 - EQUIPPING MOTOR VEHICLES WITH RADIO RECEIVING SETS CAPABLE OF RECEIVING SIGNALS ON THE FREQUENCIES ALLOCATED FOR POLICE USE.  

From QSY News: "For the complete NYS law go to http://www.senate.state.ny.us/ and select "Bills and Laws" which is the third item down on the left side. Then under Legislative Session Information select Laws of New York which is the fifth item in the list. Under "Consolidated Laws" select VAT (for Vehicle and Traffic Laws) and scroll then down to section 397 which is the specific law and print a copy of New York State Vehicle and Traffic Laws Title 3 Article 12 Section 397."

Section 397on the Long Island Area Scanning Resource web site.

Section 397 simple printable version

Vehicle and Ttraffic Law Index (pdf -NYS DOJ) 

 Sections that apply to emergency vehicles (pdf - NYS DOH)