Shopping cart checkout minor modification

Had freelancer add 'local pick-up' choice for when customers order off site. Works fine. Unfortunately, forgot that site also has a SUBSCRIPTION module where customers have books shipped to them either weekly, monthly, etc. Did NOT want the LOCAL PICK-UP choice to be available for on-line subscribers - only for people placing and completing (making payment) for their orders on the site there and then. In other words if you're placing an order and paying for it now you can choose 'pick up at store' options like it's currently set. But when a customer sets up their subscription account I need to make sure this option is NOT available. I'm thinking this is a minor tweak and shouldn't take too long. I've taken a screen shot of the page as an example.