Paragraph 18

Where under this Schedule any question falls to be determined by the court or F1the appropriate tribunal by reference to circumstances at a future date, the court or appropriate tribunal shall have regard to all rights, interests and obligations under or relating to the tenancy as they subsist at the time of the determination and to all relevant circumstances as those then subsist and shall assume, except in so far as the contrary is shown, that those rights, interests, obligations and circumstances will continue to subsist unchanged until that future date.