D.C. Mun. Regs. tit. 22-B, § 3209
3209.1 A Nursing Services Supervisor shall be on duty at all times.
3209.2 Each Nursing Services Supervisor shall:
3209.3 The Director of Nursing may serve as the Nursing Services Supervisor while on his or her regular tour of duty, if the facility has a licensed bed capacity of thirty (30) or less.
3209.4 A charge nurse may serve as the Nursing Services Supervisor when he or she is a registered nurse.
SOURCE: Notice of Final Rulemaking published at 49 DCR 473 (January 18, 2002).