This rule comes under Chapter V – ATHLETES
2.1 Less formal dress is acceptable in the marathon for the athletes and grooms. Shorts are not permitted: infringement will incur 10 penalties per person
2.2 Athletes and grooms must wear securely fastened protective headgear and a suitable back/body protector on the marathon or combined marathon/derby. Infringement will incur elimination. Any athlete/groom who continues on the course without a hard hat or a suitable body/back protector after elimination will be disqualified.