Eg. no law in Poland regulates legal gender change process. But there is a series of directves for courts on how this should be addressed issued by whoever is in the govt at the moment. One govt issued a directive that those are low prority, other that spouse and children should have a power to veto, another that actually those are high priority and then govt-appointed judges in the supreme court decided to veto the veto and implement new procedure altogether. And none of this is in the law - just directives for judges from pliticans and higher judges.
2) It was just an example. Each person should study their aplicable law-making process.