A person is a priority successor of the contract-holder if—
he or she—
is the spouse or civil partner of the contract-holder, or
lives together with the contract-holder as if they were spouses or civil partners, and
he or she occupied the dwelling as his or her only or principal home at the time of the contract-holder's death.
But no person is a priority successor of the contract-holder if the contract-holder was a priority successor in relation to the occupation contract.