Houston Dressage Society (HDS) annually hosts dressage shows at three different tiers. Each tier is designed to be progressive from the prior one to help horses and riders grow. Each tier also has somewhat different rules and requirements although the arena with letters is the same.
All three competition tiers offer rider divisions for Youth, Adult Amateur and Open (mostly professionals). The published prize-list for each show contains entry information and fees.
Here is a brief description of each competition tier: