From the Kingdom Seneschal, Duke Christopher: 

This is a reminder to all Crown Tournament combatants and consorts that your letters of intent are due no later than April 13th. You may use the new online form, found here: http://ae.scaforms.org/view.php?id=31838, or email, mail, or hand deliver as outlined in Article III of Kingdom Law.

Please let me or Their Highnesses know if you have any questions.