After the recent Oceangate Titan submersible disaster, much attention has been drawn to the fact that there was no requirement for licensing or certification, due to operating in international waters. It has been said that Oceangate operated in a "regulatory no man's land" and that the results of an investigation may be of limited value, since no government has the jurisdiction to implement practical changes in the rules.
I imagine that there are ways to regulate such activities. For instance, countries can make it illegal for a ship offering unlicensed deep-sea exploration tours to dock in its ports. (Of course, this can be circumvented by using a different country as a starting point). Another measure might be to "sanction" a company, i.e. to prohibit the selling of parts or technology to a company offering uncertified ocean tours, which could be effective if most of the world's developed countries were on board.
However, I say all this as someone who knows nothing of the relevant laws/treaties/practices. What do experts on this subject think? For example, do you think that the results of an investigation into the Titan disaster could lead to practical changes?