Online Signup. Sign up here to join the SCTA, and to compete at our events. Here's the scoop: Join the SCTA with an annual membership. We offer both individual, and family memberships. Also, use the buttons below to register for trials competition. Save even more time- create an account with us, from the menu above. With a user account, sign up can be done in just a few clicks, each and every time. Thank You. Please note: Competition registration at the event adds an additional $5 to the costs below.