USAT has changed the minimum weight of the Clydesdale and Athena triathlon and duathlon divisions. I copied and pasted this from the USAT website:
Weight Class Division - In events where a weight class division
is offered, the minimum weight shall be 220 pounds for men and 165 pounds for
women, monitored by the event organizer. The weight class age categories for men
and women shall be 39 years of age and under and 40 years of age and over.
Participants are not eligible to compete in a weight class division and in an
age group division at the same event.