Job Placement Policies
One of the few differences between Accelerator Plus and Accelerator is that, while Accelerator supports many placement policies, Accelerator Plus only supports the job placement policy called "first", meaning that a job is dispatched to the first tasker found that is capable of running the job.
You can still specify any JPP as you submit the workload, but that JPP is passed to Accelerator (assuming Accelerator is the base scheduler) while Accelerator Plus itself uses the "first" JPP.
For a complete description of job placement policies, see Job Placement Policies.