Are my spurs legal?

[Libera]

I tried to look for myself, but can't seem to find it. Can anyone tell me whether my spurs are ok to use at a show? They're the Klaus Balkenhol kind with rowels, with the blunt "teeth".

[Ambrey]

http://www.usef.org/documents/FormsPubs/DressageEquipmentBooklet.pdf

Spurs must be made of metal. The shank must be either curved or straight pointing
directly back from the center of the spur when on the rider’s boot. If the shank is curved,
the spurs must be worn only with
the shank directed downwards.
However, swan necked spurs are
allowed. The inside arms of the
spur must be smooth and one or
both arms may have rubber covers.
If rowels are used, they must be blunt/smooth and free to rotate.