New York: Shelter Island Justice Court mandates ignition interlocks in DWI cases; but who makes sure the devices are installed?

From ShelterIslandReporter.com:
Marcos A. Reyes of Silver Spring, Maryland was fined $2,000 plus $400 for aggravated DWI. He was given three years’ probation, a six-month license suspension and a court-ordered ignition interlock. Lane and turn signal violations were dismissed as covered.