Section 8: Safety Considerations

Boots, jewellery and protective equipment are regulated under Law 9. Items likely to cause injury are prohibited (Law 9.2), equipment may be inspected (Law 9.3), and an Umpire may order a player off the playing surface until an offending item is removed (Law 9.4).

Source: Law 9, Law 9.2, Law 9.3, Law 9.4, Law 22, Law 23, Law 18, Law 19, Law 24, Law 3.3

Send this to your friend — argument over.