There is, in fact, nothing that states when the EMD is due to the title company. Option money, yes. The only concern is delivering within a reasonable amount of time and that must be determined by the parties involved in the transaction.
Most agents default to two days because it corresponds to the option timing. Yet the only language in the contract (referring to One to Four Resale) relating to EMD is the 2nd sentence of Section 5: "Buyer shall deposit additional EM of $XX with escrow agent within XX days..." This only qualifies if additional money is required.
Best course of action: Get the EMD to title as quickly as possible after the contract has been executed.