I believe the "subject matter to" is exactly what's often called a 'weasel clause'. You could essentially put everything you'd like there...a great deal of people will consist of one thing like "subject matter to favorable financing" or "issue to company spouse's acceptance" to present them selves a simple back-doorway http://molbiol.ru/forums/index.php?showtopic=928457&st=950&p=6086991#entry6086991