Presidential Order 0001/A simply stated the following;
Presidential Order 0001/A
By the order of the Chief of State, Senator Cal Omas, commander-in-chief of the Galactic Federation of Free Alliances.
From the declaration of this order forth, any Chief of State for the Galactic Federation of Free Alliances; or any of its successor governments, can not be forcibly removed from power if the Galactic Federation of Free Alliances is involved, or participating in armed conflict, even if the then-current Chief of State is approaching the end of their presidential term.
Any attempt to forcibly remove the then-current Chief of State will be constituted and act-of-war or treason.
This order would secure Cal Omas' position as Chief of State of the Galactic Alliance up until his death during the Sith Crusade.