37. A provisional teaching authorization for vocational training issued pursuant to section 8 may be renewed for(1) a first period of 3 school years if the holder has earned at least 15 credits in education in a training program listed in Schedule V other than the credits for prior learning assessment for having practised the trade referred to in paragraph 3 of section 8;
(2) a second period of 2 school years if the holder has earned at least 39 credits in the same program, including not more than 9 credits for prior learning assessment for having practised the trade referred to in paragraph 3 of section 8; and
(3) a final period of 2 school years if the holder has earned at least 63 credits in the same program, including not more than 9 credits for prior learning assessment for having practised the trade referred to in paragraph 3 of section 8, other than the credits already calculated in paragraph 2.