They havne;nt been set, they aren’t enforced yet. All we have on them is leaks.
Also, they aren’t neccessarily permanent. They banned real incest in 1999, and quietly lifted the ban in 2004. (They may ban it again, but we still don’t have anything really clear on this besides a list on a single site.)
So, if things become less problematic, they may lighten or remove some of these restrictions.
It may work.