The Krona Protocol is an inbuilt security device linked directly to the Central Power Battery of Oa, presumably activated only by the Guardians of the Universe, though it is known to the Green Lantern Honour Guard, given that Guy Gardner was able to explain to Hal Jordan what the Krona Protocol was when the Guardians initiated it. The Protocol itself is a defensive mechanism that when activated, immediatally removes the Battery via teleportation to an unspecified location presumably of the Guardians choosing, until the Guardians decide that the danger has passed. The Protocol is described as being a desperation move, used when the Battery itself is in direct and immediate danger of destruction, taint, or falling into the wrong hands.