I think this question & answer will apply to Blake Montgomery's signing with London, he has not signed with Ottawa and London will not accommodate him for more than his necessary league and daily living expenses, he should be okay to sign with London base on this answer if accurate and there are no other clauses ;
I WAS RECENTLY DRAFTED BY A TEAM FROM THE CHL (INCLUDES THE OHL, WHL, AND QMJHL) AND THEY WANT ME TO SIGN A CONTRACT IMMEDIATELY. IS IT OK FOR ME TO SIGN A CONTRACT EVEN THOUGH I WONT PLAY FOR THEM THIS YEAR?
Players may now participate in the CHL (which includes the OHL, WHL and QMJHL) prior to initial full-time collegiate enrollment, and not jeopardize their NCAA DI eligibility provided not more than actual and necessary expenses for participation are received or guaranteed or specified.