N.Y. WKC Law § 22

§ 22. Modification of awards, decisions or orders. Upon its own motion\nor upon the application of any party in interest, on the ground of a\nchange in conditions or proof of erroneous wage rate, the board may at\nany time, subject to the limitations set forth in sections twenty-five-a\nand one hundred and twenty-three of this chapter, review any award,\ndecision or order and, on such review, may make an award ending,\ndiminishing or increasing the compensation previously awarded, subject\nto the maximum or minimum provided in this chapter, and shall\nimmediately send to the parties a copy of its decision, which shall\ninclude a statement of the facts which formed the basis of its action.\nNo such review shall affect such award as regards any moneys already\npaid, except that an award increasing the compensation rate may be made\neffective from date of injury, and except that if any part of the\ncompensation due or to become due is unpaid, an award decreasing the\ncompensation rate may be made effective from the date of injury, and any\npayments made prior thereto in excess of such decreased rate shall be\ndeducted from any unpaid compensation, in such manner and by such\nmethods as may be determined by the board.\n