N.Y. Insurance Law § 4117
(b) For all outstanding losses and loss expenses, the reserves shall include the following:
(d) The minimum reserves for outstanding losses and loss expenses under policies of workers' compensation insurance, except as provided in subsection (e) hereof, shall be computed as follows:
(g)
(1) Effective with the nineteen hundred ninety annual statement, every licensed property/casualty insurer required to file such annual statement with the superintendent by the following April first, shall, unless exempted by the superintendent, engage a qualified independent loss reserve specialist for the following year to render an opinion as to the adequacy of its loss and loss adjustment expense reserves when two of three of such insurer's results of its loss and loss adjustment expense ratios as indicated below are outside of the indicated acceptable ranges: