I recall reading an interview w. McKenzie in which he mentions that the non competes do not merely prohibit appearances that overlap with the Met season, but also extends for 3 months before and 3 months after the Met season. I'm not sure when the non competes at ABT came into existence. Of course, ABT could always agree to waive enforcement of the non compete, but that puts dancers at the benevolent whim of ABT management. Certain dancers like O/V have enough bargaining power to say I'm not signing any such contract. If you want me to dance with your company, remove the clause.
Ah that is good to know.
Quite frankly, given the Mik's recent problems and now dancing with both ABT and Royal, I'd be most nervous if I was them. I know it says she is staying there, but things can always change.
And lets not forget, for one of the foreign stars, she has been quite active with ABT, participating in tours, etc. which has not been the case with many (see for ex. Vishneva)