BPMN11 — Where are tokens queued?

In the following process, assume mulitple tokens are being fed to A
from upstream (<X> = exclusive OR split, <+> = AND Join):

----> A – <X> <+> --> B

I assume two executions of A are required for each execution of B (if
not, correct the parts of the spec that imply this).

Where are tokens queued up that don't have a matching one to get
through the AND join? BPMN should indicate where the queuing happens,
because it affects execution. If queuing is at the the exclusive-OR
split, then conditions could change over time and the guard could
direct the token to a different path after the token as been queued a
while. Or token could queue at the join, and only be tested by the
guards once.

Suggested Resolution:
Close, No Change: This issue is out of scope for the RTF and will be addressed by the response to
the BPMN 2.0 RFP.
Revised Text: None
Disposition: Closed, deferred