D.C. Mun. Regs. tit. 22-B, § 154
154.1 Laboratory evidence of immunity for each vaccine-preventable disease may be accepted in lieu of the required immunizations for each disease described in sections 130 through 153 and may be required in particular circumstances.
SOURCE: Final Rulemaking published at 44 DCR 1656, 1669 (March 21, 1997); Final Rulemaking published at 55 DCR 5253 (May 2, 2008).