This is from 2009 not sure if it helps you
507.3.1 Mixed occupancy buildings with Groups A-1 and A-2. Group A-1 and A-2 occupancies of other than Type V construction shall be permitted within mixed occupancy buildings of unlimited area complying with Section 507.3, provided:
1. Group A-1 and A-2 occupancies are separated from other occupancies as required for separated occupancies in Section 508.4.4 with no reduction allowed in the fire-resistance rating of the separation based upon the installation of an automatic sprinkler system;
2. Each area of the portions of the building used for Group A-1 or A-2 occupancies shall not exceed the maximum allowable area permitted for such occupancies in Section 503.1; and
3. All exit doors from Group A-1 and A-2 occupancies shall discharge directly to the exterior of the building.
This section allows Group A-1 and A-2 occupancies in mixed occupancy, single-story unlimited area buildings under limited conditions. Atypical example of a practical application of this would be the construction of a strip mall that is mainly for retail stores, but might contain a restaurant or a movie theater, or both. Group A-1 or A-2 buildings would not be permitted as standalone unlimited area buildings. Similar to the requirement in Section 507.3 for Group A-4 buildings, unlimited area buildings that contain a Group A-1 or A-2 occupancy are not permitted to be built of Type V construction.
The restrictions on the use of Group A-1 or A-2 occupancies in mixed occupancy, unlimited area buildings include: (1) required separation; (2) limited area of each Group A occupancy to the area allowed in Section 503.1; and (3) all required exits discharging to the exterior.
Item 1 states that the Group A-1 or A-2 occupancy is required to be separated from the rest of the unlimited area building by fire barriers in accordance with Section 508.4.4. For example, if a strip mall contains mercantile facilities next to a theater (Group A-1), the theater would need to be separated from the mercantile facilities by a 2-hour fire barrier, as determined from Table 508.4. Although the unlimited area building is required to be sprinklered, the required fire-resistance rating for the Group A-1 or A-2 occupancy separation must be based on the nonsprinklered entry in Table 508.4 (i.e., no reduction is permitted in the fire-resistance rating of the separation due to the presence of the sprinkler system).
Item 2 requires each Group A-1 or A-2 area to be limited to that allowed by Section 503.1. For example, if the strip mall mentioned above were Type IIB construction, the allowable area of the theater would be 34,000 square feet (3159 m2) [tabular value of 8,500 square feet (790 m2) × 4]. Note that the allowable area is increased by 300 percent as permitted by Section 506.3 for single-story buildings equipped with fire sprinklers. The allowable area could also be increased for frontage in accordance with Section 506.2, depending upon the amount of frontage that the Group A portion has, relative to its own perimeter. The important point is that the area limits for each Group A-1 or A-2 occupancy are based upon Section 503.1, not the tabular values of Table 503. Thus, because Section 503.1 states that the allowable area is limited to the values in Table 503.1 except as modified hereafter, the allowable increases given in Section 506 would be applicable. Also note that each Group A-1 or A-2 occupancy is evaluated on its own and not as an aggregate (i.e., the area of the Group A-1 and A-2 occupancies would not have to be added together).
Item 3 states that all exits from the Group A-1 or A-2 occupancy must discharge directly to the exterior. While other paths of travel available to the occupants are permitted to discharge back into the building, the required exits must discharge directly to the exterior such that an occupant in the Group A-1 or A-2 portion can exit the space without having to pass through other parts of the building. This eliminates the hazard of having to pass through higher fuel load areas.
