Enforcement of specifications

Paul Leach wrote to the mailing list of the former, and perhaps now 
nascent, HTTP Working Group:

> The only "enforcement" mechanism is that vendors can't morally
> claim conformance unless they obey.

False advertising is illegal in some jurisdictions, so the matter is a 
matter of law and not only of morality. A matter of law is susceptible 
to action in the courts. Authorities of the state typically enforce the 
decisions of the courts. Therefore, given a certain amount of effort and 
talent, concerned parties can enlist the state as their enforcement 
mechanism.