CFR > Title 29 - Labor > SUBTITLE B—Regulations Relating to Labor > CHAPTER V—WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR (parts 500 to 871) > SUBCHAPTER A—REGULATIONS (parts 500 to 697) > PART 520—EMPLOYMENT UNDER SPECIAL CERTIFICATE OF MESSENGERS, LEARNERS (INCLUDING STUDENT-LEARNERS), AND APPRENTICES > SUBPART D—Messengers, Learners (Excluding Student-Learners), and Apprentices (§520.400 to §520.412) > 520.410—How long does a messenger, learner, or apprentice certificate remain in effect?

520.410—How long does a messenger, learner, or apprentice certificate remain in effect?

(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.