N.Y. Comp. Codes R. & Regs. tit. 8, § 2203.1
(c) Upon the receipt of a written request prior to the deadline for submission of a payment application, an extension of the seven-year period may be granted for the following reasons:
(2) active service in the national welfare in a program such as the Peace Corps.
Such extension shall be limited to the period of service but in no event shall exceed three years. Written requests for a leave of absence made pursuant to subdivision (b) of this section and based on the reasons listed in this subdivision shall be considered requests for an extension.