47 CFR § 64.2501
Scope of limitation
February 16, 2021
For the purposes of this subpart, a multiunit premises is any contiguous area under common ownership or control that contains two or more distinct units. A commercial multiunit premises is any multiunit premises that is predominantly used for non-residential purposes, including for-profit, non-profit, and governmental uses. A residential multiunit premises is any multiunit premises that is predominantly used for residential purposes.
[73 FR 28057, May 15, 2008]