There are provisions for portable toilets or porta-potties in any triathlon race to relieve yourself on race day (source). They are usually located 12-15 miles apart on a bike course and 1-1.5 miles apart on a run course. However, the best advice for any athlete is to visit the bathroom before the race.
A triathlon license is a permit granted by the national authority. This license guarantees that all the events organized by the national authority are managed under the policies, terms, and conditions set by event organizers. Most importantly, it offers participants insurance to make the experience safe and enjoyable.
Some children have more endurance while some have less than the average. Take some time to know your child’s needs and enroll them in the respective program. If they are weak in one of the legs, you can always train them for it or participate in biathlon until they are ready for a triathlon.
Triathlon cutoff time is crucial, and meeting triathlon overall cutoff times of the sprint triathlon (3hours), Olympic triathlon (4 hours 30 minutes), half Ironman triathlon (8hours 30mins), and the Ironman triathlon (17 hours) starts from your training sessions.
A pregnant woman can race a triathlon but it should be noted an evaluation of how active you were before pregnancy is required.