A minor who is at least sixteen years of age may be employed or permitted to work in a hazardous occupation if the minor is in a registered apprenticeship program or is a student learner of an approved career and technical education program. Under this section, a parental signature is required for the minor to participate as an apprentice or student learner. This section does not limit the ability of a minor who is at least sixteen years of age to work in an occupation already permitted by law.