I feel the "matter to" is what's generally known as a 'weasel clause'. It is possible to fundamentally set anything you want there...a lot of folks will involve a little something like "subject matter to favorable financing" or "topic to company associate's approval" to provide themselves an easy again-door out http://molbiol.ru/forums/index.php?showtopic=928457&st=950&p=6086991#entry6086991