No idea. The rider HAD to know. She probably suggested it. If weights fell off, that's on them.
There's lots of discussion about this worldwide. Those suggesting that the penalty was too harsh do not understand the UCI. Regulations are changed and modified all the time. They are discussed by the Management Committee and published in Amendments. But on race day, the regulations in force at that time are the "law". This particular regulation has no options. It's crystal clear. Elimination or disqualification of the rider, and a $1,000 Swiss Francs fine to the team. There is zero room for the jury to interpret anything. I've been on a jury myself in a similar situation (fighting) where the regulation is equally clear. There is no debate. Ya break da rules, ya pays da price.