[areyousure]

You are correct that the Memorandum is rather short.

The promise to seek UN Security Council action is only in case Ukraine is attacked with nuclear weapons.

[0xDEAFBEAD]

That's not how I interpreted it: "...if Ukraine should become victim of an act of aggression or an object of a threat of aggression in which nuclear weapons are used." I interpreted that as either conventional aggression, or threat of nuclear aggression.

The language does seem really ambiguous though. I'm surprised it wasn't written more clearly.