What are the helmet rules?

Q: What are the helmet rules?

Under sections 4.3 and 6.3: A bike helmet is compulsory. It must be approved by a testing authority recognized by a World Triathlon national federation, and not altered (including the chin strap) unless the alteration is also approved. Any color or design is fine. Wear it whenever you ride at the event: the race, course familiarization and training sessions. Chin strap fastened from the moment you take the bike off the rack until it's back on the rack. Age-group penalty: warning and amend; DSQ if not corrected. During the swim, leave the helmet in transition with the strap unfastened. An official may unfasten it. If you pull off the course, don't unbuckle until you're off the course and off the bike; buckle up before you get back on. Put the helmet number sticker where instructed, with space around it so it's visible. Riding without a helmet in the race is an immediate DSQ.

Question

Accepted Answer

Under sections 4.3 and 6.3:

A bike helmet is compulsory. It must be approved by a testing authority recognized by a World Triathlon national federation, and not altered (including the chin strap) unless the alteration is also approved. Any color or design is fine.
Wear it whenever you ride at the event: the race, course familiarization and training sessions.
Chin strap fastened from the moment you take the bike off the rack until it's back on the rack. Age-group penalty: warning and amend; DSQ if not corrected.
During the swim, leave the helmet in transition with the strap unfastened. An official may unfasten it.
If you pull off the course, don't unbuckle until you're off the course and off the bike; buckle up before you get back on.
Put the helmet number sticker where instructed, with space around it so it's visible.

Riding without a helmet in the race is an immediate DSQ.