The problem is, once you allow an open system, you've COMPLETELY LEFT THE SECOND LAW OF THERMODYNAMICS BEHIND! So why mention it at all?
Because it sounds impressive.
The rest of the "requirements" are NOT a part of the laws of Thermodynamics, at all. They are not derived from the scientific literature, but are extra requirements dreamt up by creationists. However, by putting them in the context of the 2ndLOT, creationists hope to give an aura of credibility to their off-the-tops-of-their-heads nonsense.