Article 39 Burden of proof
If in any proceedings before the appellate authority a party asserts that a decision or action taken against him under any statutory provision ought not to have been taken on the grounds that he is not a person to whom the provision applies, it shall lie on him to prove that he is not such a person.
If in any proceedings before the appellate authority a party asserts any fact of a kind that, if the assertion were made to the Secretary of State or any officer for the purposes of any statutory provisions or any immigration rules, it would by virtue of those provisions or rules be for him to satisfy the Secretary of State or officer of the truth thereof, it shall lie on that party to prove that the assertion is true.
In this rule, “immigration rules” means the rules referred to in section 3(2) of the 1971 Act and a reference to “statutory provisions” includes a reference to any provision made under an enactment.