From the plain meaning of the statute, black cars are taxis.
http://www.ca2.uscourts.gov/decisions/isysquery/85b366f3-f243-43e5-81c8-b4640a784328/2/doc/17-2438_opn.pdf#xml=http://www.ca2.uscourts.gov/decisions/isysquery/85b366f3-f243-43e5-81c8-b4640a784328/2/hilite/
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.