Actually, it isn't...and I have read, cover to cover, twice now.
I did, however, get an answer from Options Industry Council. The short version is the contract language, in it's entirety is, "Buy 100 XYZ @ $100, Apr 20, 2018". The contract in this case is not a paper contract, per se, but is a mutual understanding (which is a legally enforceable "contract") and is informed by ordinary industry trade practices.
So, follow up question: Is anyone aware of any (US) court cases dealing with controversy arising over the obligations of the contract? (Beyond the "I can't pay", "You must pay" variety)