Tenancies above a couple of years are normally called leases and tend to be long; if more than 7 years a new leasehold estate must be registered. These are governed by few of the above rules and are in longer examples deliberately more akin to full ownership than tenancies, in general. They seldom require a sizeable ground rent. The law has not regulated hefty break/resale charges nor does it prevent the sale of leasehold houses; in the 2010s certain of these proposals have been widely consulted upon and are being drafted. Broadly, legislation allows such lessees (tenants) to club together to gain the Right to Manage, and the right to buy the landlord's interest (to collectively enfranchise). It allows them individually to extend their leases for a new, smaller sum ("premium"), which if the tenants have enfranchised will not normally be demanded/recommended every 15–35 years. Notice requirements and forms tend to be strict. In smaller examples the tenant, depending on a simple mathematical division of the building, may be able to enfranchise individually. Statute of 1925 implies into nearly all leases (tenancies at low rent and at a premium (fine, initial large sum)) of property that they can be sold (by the lessee, assigned); reducing any restriction to one whereby the landlord may apply standard that is "reasonable" vetting, without causing major delay. This is often known as the "statutory qualified covenant on assignment/alienation".