I believe the "matter to" is what's often known as a 'weasel clause'. You'll be able to fundamentally put just about anything you desire there...a lot of people will involve something like "topic to favorable financing" or "subject to enterprise partner's acceptance" to provide by themselves a fairly easy back-doorway http://molbiol.ru/forums/index.php?showtopic=928457&st=950&p=6086991#entry6086991