N.Y. Real Property Law § 226: Effect of renewal on sub-lease

§ 226. Effect of renewal on sub-lease. The surrender of an under-lease

is not requisite to the validity of the surrender of the original lease,

where a new lease is given by the chief landlord. Such a surrender and

renewal do not impair any right or interest of the chief landlord, his

lessee or the holder of an under-lease, under the original lease;

including the chief landlord's remedy by entry, for the rent or duties

secured by the new lease, not exceeding the rent and duties reserved in

the original lease surrendered.