D.C. Mun. Regs. tit. 17, r. 17-3714
The following persons shall be authorized to engage in the prelicensure supervised practice of barbering, cosmetology, or specialty cosmetology:
A student may engage in prelicensure practice only after completion of one-third (1/3) of the required course hours in a licensed school.
A student who practices pursuant to this section shall practice only in a licensed school under a licensed instructor.
An applicant may engage in prelicensure practice only upon submitting a complete and accurate application and receiving a letter permitting supervised practice from the Board. An applicant under § 3714.1(b) who fails the examination for licensure shall not be permitted to continue practicing under this section and shall be required to meet the examination requirements set forth in § 3707 for reexamination.
An applicant shall take the first licensing examination offered by the Board following submission of the application for licensure.
The Board may waive § 3714.5 if the applicant's reason for failing to sit for the first examination constitutes good cause.
A student or applicant shall be subject to all of the applicable provisions of the Act and this chapter. The Board may deny an application for a license by, or take other disciplinary action against, a student or applicant who is found to have violated the Act or this chapter.
An applicant shall take the next examination following a waiver of the provision for examination in § 3714.6.
A person who has been denied a license or disciplined by the Board, or who has such an action pending in the District of Columbia or in another jurisdiction, shall not practice pursuant to this section unless authorized by the Board in writing.
An applicant who practices pursuant to this section shall practice only in a licensed school, salon or shop.
A student or applicant shall practice only under the immediate supervision of a licensed barber manager or instructor, cosmetology manager or instructor, or specialty cosmetology manager or instructor.
A student or applicant shall not receive compensation of any kind from a customer, either directly or indirectly, except for a salary based on hours worked under supervision.
While serving the public, the student or applicant shall wear a nametag acceptable to the Board indicating their status as a student or applicant.
A student or applicant shall not assume management or supervisory responsibility for the operation of a school, salon, or shop.
The supervisor shall be fully responsible for all practice by a student or applicant during the period of supervision and is subject to disciplinary action for any violation of the Act or this chapter by the student or applicant.
D.C. Mun. Regs. tit. 17, r. 17-3714