8U.K.Where the relevant provisions include provision equivalent to such a sentence as is mentioned in paragraph (2) of Article 22 of the Firearms (Northern Ireland) Order 1981 (possession of firearm by person previously convicted of crime), that paragraph shall apply in relation to the prisoner as if for the reference in that paragraph to the period of eight years from the date so mentioned there were substituted a reference to the period of eight years from the day on which the relevant provisions take effect.