Murphy was referred to Portman Square by the Aintree stewards over his use of the whip on Juyush, pulled up behind Istabraq in the Aintree Hurdle.
In changes to the whip instructions which took effect on 1 March this year, any jockey found to be in breach of the rules in a Grade or Group One race is automatically referred to the Jockey Club.
If the Disciplinary Committee also find the jockey in breach they will suspend him for a minimum of 10 days.
They will also have the flexibility to choose on which days the suspension should apply, although it is anticipated that this power will be used only in exceptional circumstances.
Murphy is the first jockey to be thus referred to the stewards of the Jockey Club for use of the whip in a Grade One race.
n Tajoun repeated his 1998 success in the Listed Prix Right Royal on his reappearance at Maisons-Laffitte yesterday. The Aga Khan stayer's only defeat of last season was inflicted by the British pair, Arctic Owl and Grey Shot, in the Group Two Prix Kergorlay.Reuse content