When Richie Porte (Team Sky) punctured and watched the peloton disappear down the road, he was only too glad to receive a replacement wheel from Orica-GreenEdge's Simon Clarke.
The race's rule committee took exception to this 'non-regulataion assistance' and gave the GC contender a two minute penalty, all but ending his hopes of a win or perhaps even a top-five finish.
As a result of this, we started to think about the UCI's long list of rules, a compendium of regulations that it is surely impossible for riders to be completely familiar with - as stated by Porte at the time of his penalty.
So for this week's cycling quiz we've come up with ten questions to see how familiar you are with some of the UCI's laws.
Thank you for reading 20 articles this month* Join now for unlimited access
Enjoy your first month for just £1 / $1 / €1
*Read 5 free articles per month without a subscription
Join now for unlimited access
Try first month for just £1 / $1 / €1