Factual possession, meaning you have exercised physical control over the land, for example if the ground is open land then fencing would show such control. Together with an intention to possess the land, such possession to have taken place without any consent being granted, for a period of at least twelve years.
The Landlord must serve upon the Tenant a Notice informing the Tenant of their intention to exclude the security of tenure provision. The Tenant will reply to the Notice with a Statutory Declaration confirming their intention to enter into the Lease with the exclusion of security of tenure.