In Canada, lower levels of formal training are defined as: Select one: Occupations that usually require at most a high school diploma or a maximum of 2 years of job-specific training according to the NOC Classification system. These occupations are coded at the NOC C or D skill level. Occupations that usually require at most a high school diploma or a maximum of 4 years of job-specific training according to the NOC Classification system. These occupations are coded at the NOC C or D skill level. Occupations that usually require at most an elementary school diploma or a maximum of 2 years of job-specific training according to the NOC Classification system. These occupations are coded at the NOC C or D skill level. Occupations that usually require at most a high school diploma and no job-specific training according to the NOC Classification system. These occupations are coded at the NOC C or D skill level