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The sign off was by Zorzoli on his own which WADA were very concerned about because they require the 3 expert panel (referred to by BW) that UCI only actually put in place in 2015.
The whole UCI TUE process that was in place pre-2015 was Zorzoli was able to do whatever he wanted. And people like Rasmussen have said he was complicit in what went on at Rabobank. With Leinders. And TUEs.
Well - he definitely hasn't (legally) because he was given TUE's by the authorities.
Ethically, my personal view is that they did step over the line. I don't Sky would be happy if it was another team and were they in the MPCC he wouldn't have ridden / taken it. And if it was Valverde or Contador I'd be thinking there goes the filthy doper again. IANADr but it seems likely that what he was given was more than strictly necessary and probably did have positive impact on performance.
That said, the treatment was signed off 3 times, (by different people?) so it clearly wasn't that obviously dodgy.