51. A teaching diploma may be issued to a person who
(1) has obtained a teaching permit after meeting the requirements of section 50;
(2) earned, during the validity period of the permit referred to in paragraph 1, at least 15 credits in education as part of a teacher training program listed in Schedule II directly related to a program underlying the permit, including at least 6 credits in didactics, 3 credits in evaluation of learning achievement and 3 credits in intervention with handicapped students or students with social maladjustments or learning disabilities; and
(3) successfully completed the probationary period during the validity period of the permit referred to in paragraph 1.