Original: If the tenancy began between 15 January 1989 and 27 February 1997, your landlord had to have given you a document called a Notice of an Assured Shorthold Tenancy (or ‘ Section 20 ’ Notice) if the landlord wanted the tenancy to be an Assured Shorthold.
Simplified: If the landlord wanted the tenancy to be an Assure Shorthold, he had to have given you a document called a Notice of an Assured Shorthold Tenancy (or 'Section 20' notice). This applies if the tenancy began between 15 January 1989 and 27 February 1997.