493. Notice to quit part under other means.

The contract of tenancy1 may expressly provide for notice to quit part only of the holding; additionally, on severance by conveyance, surrender or otherwise of the reversionary estate in any land comprised in a lease (which includes an underlease or other tenancy) every condition or right of re-entry (which includes the right to determine the lease by notice to quit or otherwise) is apportioned and remains annexed to the several parts of the reversionary estate as severed