World Triathlon updates hydration rules again

They're further revising the rule changes they announced a couple months ago with a new set of updates, effective as of April 15th. The rule interpretation document includes a number of changes, but most notably, all front and rear hydration now must fit within a certain space on the bike. For front hydration: When measured from the lowest edge of the arm support (if none exists, the lowest edge of the athlete's elbow in the rider's intended aero position), all attached objects on the handlebars (bottles, holders, containers, etc.) must be within an area with the following dimensions: a maximum of 250 mm in the direction of the saddle and a maximum of 200 mm in height and no further than the foremost point of the handlebars or clip-ons, and a maximum of 20 mm from the highest point of the front wheel. And for rear hydration: All attached holders, containers, bottle holders, etc. must fit completely into an imaginary frame no larger than 30x30cm. Bottles may protrude beyond this area. The volume of liquid hasn't changed: Up to two liters in the front and back, and up to two bottles in the back. There's one big exception, though---the rules now include built-in hydration systems, so if you are using one, you can only carry up to two liters and you can't carry bottles behind the saddle. It seems the intention is to put everyone on a level playing field by limiting hydration to a total of four liters. I expect Ironman to adopt these new rules shortly, just like they did last time. In the meantime, I need to go check my hydration setup, because I honestly have no idea if it's legal anymore. Update (5/28/2025): Ironman won't be enforcing these new rules for age groups just yet.