The following is one theory that comes from the ID book The Biotic Messagehttp://www1.minn.net/~science/contents.htm by Walter ReMine
"An intelligent designer is necessary for the origin of life from non-life." The Biotic Message page. 40
It should be noted that the above theory deals specifically with life that has an origin from non-life, and thus there is nothing in the above that would also exclude the existence of an eternally existing designer (which of course would have no origin from non-life).