D.C. Mun. Regs. tit. 18, r. 18-1299
Assisted living facility - an Assisted Living Residence as defined by § 102.01(4) of the Assisted Living Residence Regulatory Act of 2000, effective June 24, 2000 (D.C. Law 13-127; D.C. Official Code § 44-102.01(4) );
Elderly housing building - a building intended and operated for elderly residential occupancy.
New residential building - a residential building for which an application of construction was submitted after the publication date of these rules.
Nursing home - a building used for the purposes described in Section 2(a)(3) of the Health-Care and Community Residence Facility, Hospice and Home Care Licensure Act of 1983, effective February 24, 1984 (D.C. Law 5-48; D.C. Official Code § 44-501(a)(3) ).
Substantially rehabilitated - any improvement to or renovation of a residential building permitted after the publication date of these rules, for which the improvement or renovation equals or exceeds fifty percent (50%) of the assessed value of the building before the rehabilitation.
D.C. Mun. Regs. tit. 18, r. 18-1299