D.C. Mun. Regs. tit. 22-B, § 204
204.1 Whenever a school child has, or is suspected of having, ringworm of the scalp, the child shall be excluded from school and shall not return to school until a certificate has been obtained at the Ringworm Clinic of the Department of Human Services, from any other clinic under the direction of a licensed physician, or from a licensed physician.
204.2 The certificate required in §204.1 shall indicate that the diagnosis has been made on the basis of an examination under the Wood's Lamp, by a culture, or by some other method approved by the Director.
204.3 A certificate may be issued during treatment according to the terms of the certificate, and may be withdrawn immediately when evidence exists of a noncompliance with its terms.
204.4 Any school child who is a contact in the household of a school child having or suspected of having ringworm of the scalp shall be examined and, if necessary, be placed under treatment by the private physician, a hospital clinic, or the Department.
SOURCE: Regulation No. 70-4 (February 27, 1970), 8 DCRR § 8-5:1-7(c) (1965).