The 'Spirit of Audax' is orienteering by bicycle, which was alive and kicking years before AUK was formed.
Originally, Audax was not Allure Libre and the whole group stayed together.
AUK modified ( or diluted ) the 'pastime' to be Allure libre and each rider could take his/her own time about it.
Bicycle Orienteering was a more difficult affair, where the Grid Ref of the first check-point was given out on the morning of the ride and riders had to firstly locate it on an OS map.
At the first checkpoint, the Grid Ref of the next check point was given out; and so on and so forth.
Audax, as we know and love is api sapis matter of plotting the route from written instructions days before the event and studying the terrian. If more appealing routes are possible, these can be taken.
When a routesheet arrives, I treat it as a bicycle orienteering event. I locate the positions of the controls and INFOs, and then find the most appealing way between them.
Not illeagal. In my mind, a little bit more 'Audacious' than a Follow my leader procession through the countryside.