Eventing dressage test for the Olympics

can be found here:
http://www.fei.org/sites/default/files/og%204%20star%20test%20b%20short%20(09.03.2012).pdf

Very interesti8ng to see that the quality of the counter canter is judged separately from the movement itself.

That is a lot of points to get or to lose in the 2 serpentines: 40 out of 230.

Dumb question - why are spurs obligatory?