(1) Except as required in Article 9.10.9.14. and as permitted by Sentence (2), each suite in other than business and personal services occupancies shall be separated from adjoining suites by a fire separation having a fire-resistance rating of not less than 45 min.
(2) In sprinklered buildings, suites of business and personal services occupancy and mercantile occupancy that are served by public corridors conforming with Sentence 3.3.1.4. (4) are not required to be separated from each other by fire separations.