N.Y. Insurance Law § 6502
(a) A mortgage insurer shall not transact business unless:
(3) in addition to the contingency reserve, the case basis method or other method as may be prescribed by the superintendent shall be used to determine the loss reserve in a manner consistent with section one thousand three hundred three of this chapter. It shall include a reserve for claims reported and unpaid and claims incurred but not reported, including:
(b) A mortgage insurer shall not: