Overseas calls? (Score 4, Interesting)

The "Do Not Call Registry" states that

33. Are telemarketing calls from overseas covered?

Yes. Any telemarketers calling U.S. consumers are covered, regardless of where they are calling from. If a company within the U.S. solicits sales through an overseas professional telemarketer, that U.S. company may be liable for any violations by the telemarketer. The FTC can initiate enforcement actions against such companies.

But I wonder how they are going to force that to an non-U.S. company?