- (a) Messenger and/or learner certificates may be issued for a period of not longer than one year.
- (b) Each special apprentice certificate shall specify the conditions and limitations under which it is granted, including the periods of time during which subminimum wage rates may be paid pursuant to a registered apprenticeship program.
- (c) No certificate may be issued retroactively.
- (d) The Administrator may amend the provisions of a certificate when necessary to correct omissions or defects in the original certificate or reflect changes in this part.