(b) In the case of a Private-Owner/PHA Project such project may not include more than one type of Section 8 assistance, shall be processed with a separate ACC List and ACC Part I and shall be assigned a separate project number. All new construction units to be placed under a single Contract shall comprise a separate project. However, the field office director may designate as a single project the units to be covered by two or more such Contracts for new construction projects where:

1. (1) The units are placed under ACC on the same date; and
2. (2) Such consolidation is necessary in the interest of administrative efficiency.