N.Y. Employers' Liability Law § 13: Cancellation of consent

§ 13. Cancellation of consent. When a consent to the plan shall have

been filed in the office of the county clerk as herein provided, it

shall be binding upon both parties thereto as long as the relation of

employer and employee exists between the parties, and expire at the end

of such employment, but it may at any time be canceled on sixty days'

notice in writing from either party to the other. Such notice of

cancellation shall be effective only if served personally or sent by

registered letter to the last known post-office address of the party to

whom it is addressed, but no notice of cancellation shall be effective

as to a claim for injury occurring previous thereto.