Data Retention and Investigatory Powers Bill

I raised this issue when the Home Secretary made her statement last week, but she is aware that some of the service providers do not accept the extraterritorial application of RIPA. She is now asserting that RIPA does have extraterritorial effect under this Bill. If some of those communication service providers maintain their current position—that it does not—what powers does she have to enforce the extraterritorial nature of the Bill and what sanctions will be available to ensure general compliance with its extraterritorial effect?