▁ 1 9 5 0 , ▁at ▁the ▁age ▁of ▁ 2 7 ▁he ▁was ▁the ▁young est ▁MP ▁in ▁Norway ▁ever . ▁He ▁was ▁later ▁elected ▁to ▁Parliament ▁from ▁Bus ker ud ▁in ▁ 1 9 5 7 , ▁and ▁was ▁re - elect ed ▁four ▁times ▁to ▁serve ▁five ▁terms . ▁ ▁Christians en ▁held ▁several ▁minister ial ▁port fol ios ▁through ▁the ▁years ; ▁he ▁was ▁appointed ▁Minister ▁of ▁Fin ance ▁in ▁ 1 9 7 1 – 1 9 7 2 ▁during ▁Br att eli ' s ▁First ▁Cab inet ▁and ▁Minister ▁of ▁Transport ▁and ▁Communic ations ▁in ▁ 1 9 7 6 – 1 9 7 8 ▁during ▁Nord li ' s ▁Cab inet . ▁During ▁the ▁first ▁ten ure ▁he ▁was ▁replaced ▁in ▁Parliament ▁by ▁Eg il ▁Sol in ▁Ran heim ; ▁during ▁the ▁second ▁period ▁he ▁was ▁replaced ▁by ▁O la f ▁ Ø en . ▁ ▁On ▁the ▁local ▁level ▁he ▁was ▁a ▁member ▁of ▁Ned re ▁E iker ▁municipal ▁council ▁from ▁ 1 9 4 5 ▁to ▁ 1 9 5 9 , ▁serving ▁as ▁mayor ▁during ▁the ▁term ▁ 1 9 5 5 – 1 9 5 7 . ▁From ▁ 1 9 5 5 ▁to ▁ 1 9 5 7 ▁he ▁was ▁also ▁a ▁member ▁of ▁Bus ker ud ▁county ▁council . ▁He ▁cha ired ▁the ▁local ▁party ▁chapter ▁for ▁several ▁periods , ▁and ▁the ▁county ▁chapter ▁from ▁ 1 9 5 5 ▁to ▁ 1 9 5 6 . ▁ ▁Out