Considering that there are only three options available, 42A 42B or 42C there are no allowances for interpretations, both LAMEs and Certifiate of Registration holders must know them and the implications if they are in breach of them. Some people still obviously have trouble understanding those options as the last two pages show but if it came to insurers not wanting to cough up the cash in a claim or CASA pinging someone the lawyers will spell it out easily enough.