- 77 - for which instruction is supplemental to their jobs. To be considered supplemental, the instruction must be such as to increase the skill or knowledge of the workers in the industrial pursuit in which they are employed. Part-time trade or technical extension classes, including supplemental instruction for apprentices, must be organized for 144 hours or more per year. If Smith- Hughes funds are used to reimburse evening trade or technical extension classes, such classes must also be organized for 144 hours or more per year. If George- Barden funds are used, evening trade or technical extension classes may be organized and conducted for less than 144 hours per year. 2.12 Provision for Supervisory, Foremanship, and Apprentice Training. 2.12-1 Supervisory and Foremanship Training. Super- visory and foremanship training may be conducted by local boards of public instruction. Approved teacher-training institutions may also conduct such training when requested by industry and approval is obtained from the State Board. Instruction may include training of conference leaders, classes in human relations, job super- vision, and similar offerings. 2.12-2 Apprenticeship Training. Special evening and part-time extension classes may be conducted for apprentices only, to provide technical and other related instruction which is supplemental to their training on the job. The term "apprentice" means a worker at least 16 years of age who is learning a recognized apprenticeable trade in accordance with a written agreement that specifies a given length *of planned work experience training through employment on the job, supplemented by appro- priate related instruction, and where the program or the apprentice or both are registered by the Florida Department of Apprenticeship under standards approved by the Florida Apprenticeship Council. Local apprenticeship committees shall work in an