Surely you do not want one person to define regulations in one day. It is (and should be) a relatively long process by legislators, in which all affected parties should participate. In this instances the main parties obviously would be:
1. The cryonics industry
2. Consumer protection groups
3. Medical profession.
4. Possibly also others, such as morticians, etc.
After the regulations guidelines and enforcement process are developed, if they are unreasonable, they always can be challenged in the courts. It is just as any other regulations of professionals. Be it doctors, surgeons, morticians, dentists, architects, or any other group.
As for suing someone, there is a difference between identifying a party and locating it. Once a party is identified, with he permission of the court it does not have to be served personally. It can be served by publication.