Certifications for Coaches are Now Mandated by AYSO! NationalCoaches, please note that AYSO National has mandated that you be certified for the age level at which you are coaching. San Marcos AYSO offers many coaches clinics throughout the season to get your certificates. A list of dates, times and locations of the coach training is listed below. Send an email to our Coach Instructor if you'd like to attend, we'll provide lunch!