New York Laws
Title 1 - General Provisions
610 - State Certified Installers.

ยง 610. State certified installers. Manufacturers and retailers may as
a condition of the sale of a manufactured home require that the home be
installed by a state certified installer and may recommend a particular
installer or installers. Manufacturers shall not void a warranty for a
manufactured home if the home buyer utilizes a state certified
installer. It shall be a violation of this article to restrict a
homebuyer from using any state certified installer chosen by the
homebuyer, or to void a warranty for a manufactured home if the
homebuyer utilizes a state certified installer.