D.C. Mun. Regs. tit. 25-D, § 1501
1501.1 An employee restriction or exclusion order, condemnation order or a summary suspension order shall be:
(a) Served as specified in section 1500.1(a); or
(b) Clearly posted by the Department at a public entrance to the massage establishment or health spa facility and a copy of the notice sent by first class mail to the licensee, or to the manager of a massage establishment or health spa facility, as appropriate.
Source: Final Rulemaking published at 56 DCR 7975 (October 9, 2009).