Can I use a radio, my phone, or headphones while racing?

No.

• Radios are banned in all junior races. Using or carrying a radio or other two-way communication device is a disqualification.
• Audio playback devices (music, headphones) are banned in every discipline and category.
• Using a mobile phone or audio device during a race is a disqualification at local one-day events, and a disqualification plus a $100 fine at national-level events.