Most residential leases do not have cancellation clauses, lawyers said.

Would have required plain language in residential leases.

This applies whether it's a residential or non-residential lease.

Many residential leases convert to "at will" tenancy subject to 30-days notice.

There still exist some long residential leases that were created prior to 1974 and their validity is not affected by the 1974 Act.

Would have required that residential leases be written in "a clear and coherent manner using words with common and everyday meanings."

Some sign rent-regulated residential leases, but until a conversion a landlord may not have challenged the use of the unit for strictly professional purposes.

Note that a higher threshold of £175,000 applied for rents on residential only leases taken from 3 September 2008 to 31 December 2009.

The two parts are calculated separately, and the rules vary for residential and non-residential leases.

In the 19th century, May 1 was traditionally the day residential leases were signed in New York.