Section 17 Leases, with obligation to renew, registerable.

Leases containing an obligation upon the granter to renew the same from time to time at fixed periods, or upon the termination of a life or lives, or otherwise, shall be deemed leases within the meaning of this Act, and registerable as such, provided such leases shall by the terms of such obligation be renewable from time to time so as to endure for a period F1exceeding twenty years