Hardshell helmets in TT

Following confirmation that the mandatory helmet rule will become fully effective for 2004, the UCI also announced during the opening days of competition at the World Championships in Hamilton that hardshell protective helmets will be required in time trial events as well as on the road. Thus far riders have been permitted to use helmets which serve no purpose other than aerodynamics in time trials, but beginning next year rigid, more functional headgear will become mandatory. This rule will apply to both road time trials and timed events on the track such as the pursuit.

This is from cyclingnews.com. Maybe this would give more off of the shelf helmet choices to us mere mortals.