When the U20 class was introduced, inconsistencies arose because some countries and competitions used different hurdle heights and shot weights than those specified by the IAAF, creating confusion.
I want to thank the publisher of this site very much, because I wrote my final work for school about "A critical view of decathlon" and Decathlon 2000 is the most important homepage about this topic. I am a decathlete myself and wish everybody much fun with this topic - Uli Röhrl