This major group comprises mail and message distribution, other transport equipment operators and related maintenance workers. These occupations come with Training, Education, Experience and Responsibility (TEER) identified as TEER 4. Occupations classified in TEER 4, as those included in this group with a 4 as the second digit of their code, typically require completion of secondary school; or several weeks of on-the-job training with some secondary school education; or experience in a related occupation from TEER 5, when applicable (TEER 5 includes occupations with a 5 as a second digit in their code).