- 48 - their respective centers records of the age and employment of students enrolled in extension classes; these records and reports are reviewed periodically by the area supervisors. Reports for cooperative and full-time classes are submitted biannually by the counties directly to the State Office. Reports of adult part-time enrollments are submitted to the State Office upon completion of the classes. 2.4 Evening and Part-Time Extension Classes. An evening extension class is defined as one which is conducted during the non-working hours of the enrollees. A part-time extension class is one con- ducted during the usual working hours of the enrollees. 2.41 Qualifications of Teachers and/or Coordinators of Evening and Part-Time Extension Courses. 2.41-1 Professional Preparation in Distributive Education. No specific training is required for teachers of evening or part-time extension classes other than in-service training that may be required by local boards of public instruction. 2.41-2 Technical Preparation in Distribution. Technical training for a part-time instructor is desirable, but may not be required if he has been successful in the special aspect of the occupation which he is teaching. 2.41-3 Experience in Business or Distributive Occupations. Teachers of evening and part-time extension classes in business and distributive education which are organized for less than 540 hours shall possess at least six years of practical experience in the occupation to be taught, a minimum of two years of which shall have been at the trained employee level. In any occupation requiring employees to be licensed by a legally constituted federal, state, or local licensing agency, such teachers shall hold a valid license to work in that occupation. 2.42 Qualifications of Teachers Used for Special Assignments. This provision does not apply. 2.5 High School Cooperative Classes. 2. 51 Time Plans for Classes and Employment. Each part-time cooperative enrollee will be employed for an average of 15 hours per week in the occupation for which he is being