No they don't.SCUBA on the other hand has innumerable certifying agencies (PADI, NAUI, SDI, TDI. IANTD, SSI, etc, etc) who establish training standards and manage the certifications centrally.
Training standards are set by the WRSTC and followed by the agencies, with the exception of CMAS.
The W in WRSTC stands for World. The opportunity for a global set of standards has already been addressed, and they're defined in ISO standards.There is an opportunity for a nationwide or global set of standards. The oxygen safety standards are an area that needs work both for blending stations and things like rebreathers that are designed to use 100% O2. The resistance to a set of national standards presumably is why there are so many different agencies (and so many models of rebreathers). It would do a lot to manage insurance.
There's not a single dive center that pays 50k-100k a year for liability insurance on this side of the pond.The 50k-100k a year that dive shops have to pay for liability insurance.