The tenant must occupy the property as a “single or principal house” to maintain a secure lease.  If there is a tenant, only one must be employed to obtain the secure tenancy agreement. When a rental agreement is held by a spouse or life partner who is an exclusive tenant and leaves the tenant, while the non-rental spouse or non-rental partner remains, the guaranteed rental status is maintained.  When the Housing Act came into force in 1988, a minimum of six months was required under section 20 Housing Act 1988. However, section 96 Housing Act 1996 abolished this rule for all new leases as of February 27, 1997, incorporating a new Section 19A into the Housing Act 1988. This new rule even meant that a fixed term was no longer necessary and that a periodic lease could in fact be granted in advance. The only potential drawback of the insured tenant (AST) is the tenant`s right to initially return the rent to a rent assessment committee; which is now called the First Tier Tribunal (Property Chamber – Residential Property). However, it can only reduce the rent if it is “significantly higher” than the rents of another comparable Assured Shorthold Tenancy (AST). In this unusual scenario, where the lessor was able to agree to a significantly higher rent than market comparisons of the same type of accommodation, the lessor may send, before or after the start of the lease, a notice under Section 21, in which it is found that it is not a secure shorthold rent (AST) that has not been the subject of a rental application.
 In other respects, STAs, with the exception of seniority security, follow, as a subset of guaranteed leases, the requirements for defining guaranteed leases, for example. B maximum and minimum rent levels, in order to exclude the most unusual extremes.  A secure rental contract is defined as an apartment rented as separate dwelling to an individual who is an individual tenant or tenant, if the tenant or at least one of the tenants lives the house as their only house or main house.  There are however some circumstances in which the new rental agreement cannot be a guaranteed short rent and must be a secure rental contract (see page Where Can`t Be an AST for more information.  Effective April 1, 2012 Registered private social housing providers (PRPSH) may grant guaranteed and guaranteed short-term rents of more than three years (i.e., the contract must say that it is an act and that the signatures of the landlord and tenant must be certified) – unless they are either long-term tenancy contracts (granted for 21 years or more) or the property.   As of February 28, 1997, most private sector or co-op rentals are automatically guaranteed by leases, unless the landlord opts for a guaranteed rent.  This is a reversal of the situation in which leases were automatically guaranteed, unless the owner took the appropriate steps to create a secure shorthold.