229. Tenancy for years.

A tenancy for a term of years arises by express contract or by statute1; and it is essential to the contract that the commencement and duration of the term should be so defined as either to be certain in the first instance2, or to be capable of being afterwards ascertained with certainty3. A term of years need not be for one continuous period4.

The term may commence either immediately or from a past or future date5. Where it is expressed to commence from a past day, the tenant's actual interest commences only on the execution of the deed6, and his