The Laws and Constitutions of the Loyal Orange Institution of Scotland  state No exRoman Catholic will be admitted into the Institution unless he is a Communicant in a Protestant Church for a reasonable period Likewise the Constitution Laws and Ordinances of the Loyal Orange Institution of Ireland  state No person who at any time has been a Roman Catholic shall be admitted into the Institution except after permission given by a vote of seventy five per cent of the members present founded on testimonials of good character     In the th century Rev Dr Mortimer OSullivan a converted Roman Catholic was a Grand Chaplain of the Orange Order in Ireland  In the s Scotland also had a converted Roman Catholic as a Grand Chaplain  Rev William McDermott  quote taken from the article   THE ORANGE ORDER  An Evangelical Perspective  ORANGEISM COMPARED WITH FREEMASONRY  SOME EVANGELICAL OBJECTIONS CONSIDERED  A REPLY TO WJMcKMcCORMICK  By REV IAN MEREDITH BA MTh Grand Chaplain Grand Orange Lodge of Scotland  REV BRIAN KENNAWAY MA Deputy Grand Chaplain Grand Orange Lodge of Ireland