No, there are no special Legislations or Directives for the flooring of climbing halls.
The German Standard „DIN 12572-1:2017-05“ recommends the installation of shock absorbing floors.
The “climbing hall handbook” from the german DAV (Deutscher Alpen Verein) recommends a shock absorbing floor as well.
Fact is: Best available technology is a floor like REGUPOL climb!