I feel the "issue to" is exactly what's called a 'weasel clause'. You can basically set just about anything you would like there...a great deal of individuals will include something like "subject matter to favorable financing" or "matter to business companion's approval" to present by themselves a fairly easy back-door http://molbiol.ru/forums/index.php?showtopic=928457&st=950&p=6086991#entry6086991