Not according to canon. There seems to be only one structure in place. Though that does make the provision of DropShips problematic for the CCAF. One also has to wonder, when this shift from standard IS organization took place and why. If this was an invention of an era before the Succession Wars, there should be DropShips available supporting that organization, e. g. enlarged and modified Unions that simply add another ASF berth. That's basically half-way to a Union-C in tonnage: 3,600 tons for the Union, 4,500 tons for the Union-C, a Union-C(CAF) might only need 4,000 tons, though, but it would need to provide for 15 units as well.
But if the invention of the typical CCAF ASF organization is a thing of the Succession Wars, then one begs to ask how they accomplished any DropShip support. Certainly, Mule-CVs are a possibility, but we never got stats for them. They're also very big, which is fine for large scale operations, but not for the company-sized raids of the Third Succession War. Also, Mules are vulnerable. Sure, the British flew Harriers off of freighters during the Falklands War, but that's not an ideal situation. Might fit the 3SW-train though. ::)