D.C. Mun. Regs. tit. 25-G, § 201
201.1 Operators shall ensure its customers are eighteen (18) years of age in order to receive a body art procedure in accordance with the Regulation of Body Artists and Body Art Establishments Act of 2012, effective October 23, 2012 (D.C. Law 19-193; D.C. Official Code § 47-2853.76e(b) (2015 Repl.)).
201.2 Operators shall ensure that before piercing a minor's ears with an ear piercing gun, the minor shall be accompanied by a parent or legal guardian, as specified in Subsection 201.3(b) and the parent or legal guardian shall have submitted a signed "Parental/Legal Guardian Authorization Form" to the establishment, as specified in Subsection 201.3(b).
201.3 Operators shall conspicuously post an "Age Restriction Sign" at or near the reception area with the following text:
(a) INDIVIDUALS LESS THAN 18 YEARS OF AGE ARE PROHIBITED FROM OBTAINING ANY BODY ART PROCEDURE, EXCEPT EAR PIERCING PROCEDURES USING A MECHANIZED, PRE-STERILIZED SINGLE-USE STUD AND CLASP EAR PIERCING GUN; AND
(b) EAR PIERCING IDENTIFIED IN SECTION "(a)" IS AUTHORIZED ONLY WITH THE WRITTEN CONSENT OF A PARENT OR LEGAL GUARDIAN SUBMITTED TO THE ESTABLISHMENT AND IF THE MINOR IS ACCOMPANIED BY A PARENT OR LEGAL GUARDIAN AT THE TIME OF THE EAR PIERCING.
SOURCE: Final Rulemaking published at 64 DCR 13496 (December 29, 2017).