- 84 - occupation requiring employees to be licensed by a legally constituted federal, state, or local licensing agency, such teachers shall also hold a valid license to work in that occupation. 2.42-2 Professional Training in Industrial Education. Types A and B day trade shop or technical labora- tory teachers shall have acquired a high school diploma or state certificate of equivalency plus 20 semester hours of teacher training, including a minimum of 14 hours of approved industrial education teacher-training courses. Day trade shop or technical laboratory teachers may be pro- visionalized for a period not to exceed five years if they possess the required work experience, a high school diploma, and two semester hours of approved industrial teacher-training courses. 2.42-3 Qualifications of Day Trade and Technical Pre- paratory Type C Teachers. Teachers of type C trade or technical preparatory classes who teach courses organized for less than 540 hours per year shall meet the same requirements as evening or part-time trade and technical extension teachers. Those teaching classes organized for 540 or more hours per year shall meet the same requirements as other day trade or technical teachers. 2.43 Qualifications of Day Trade Related Instruction Teachers. Day trade related instruction teachers shall have the same qualifications as day trade shop teachers, except that only two years of work experience is required in one of the industrial occupations for which instruction is being given. 2.5 Industrial-Plant Training. No part of the funds spent under this Plan may be expended in industrial-plant training programs except such industrial-plant training be bona fide vocational-technical training and not a device to utilize the services of vocational-tech- nical trainees for private profit. Use of funds for industrial- plant training shall be justified only when the local school system cannot otherwise provide adequate equipment and supplies and such are available in an industrial plant, provided the require- ments for public school supervision and control and other requirements of the federal acts and this Plan are met. 3.0 REPRESENTATIVE ADVISORY COMMITTEES In those counties having or anticipating preparatory trade or technical