It really depends on what your Tenant Selection Plan says.

Per HUD Handbook 4350.3 REV 1 Chg 3. Section 3-23 E. "Owners have discretion in developing occupancy policies that meet the needs of the specific property. HUD does not prescribe specific policies owners must implement but provides guidelines owners must follow when developing written occupancy standards....Generally a two-persons-per-bedroom standard is acceptable. An owner may establish a different standard for assigning unit size based on specific characteristics of the property (e.g., some bedrooms are too small for two persons)."