The general requirement is a master's degree plus up to two years, or 2,000 and 4,000 hours of supervised clinical experience in the field. (allpsychologycareers.com)
To be very clear, marriage and family therapists are required to complete specific training and supervised clinical experience in assessing, diagnosing, and treating mental illness. (blog.aamft.org)
All three of these programs include supervised clinical experience, which is necessary for certification. (positivepsychologyprogram.com)