50. The wearing of spurs in ALL classes held under B.S.P.S. Rules is forbidden, except for riders 16 years old or over in BSPS Horse Classes and the exceeding 148cms Anglo and Part Bred Arab classes.
ETA and from P(UK) rulebook
2a. Spurs/dress spurs must NOT be worn in any Show Pony/Intermediate Working Hunter/Intermediate
Show Hunter Type/Intermediate Show Riding Type/Show Hunter Pony/Working Hunter Pony,
M&M-WHP or any Ridden Mountain and Moorland showing class.