We could eventually define how the IPA CCM is expected to behave when in IPSP role (eg. implementing/allowing both sides of IPA CCM, or assigning an IPA CCM role based on TCP client/server), but that has not yet been defined.
IPSP is actually a good candidate for IPA ASPs, since in IPA proto we don't have SNM messaging either, and it's meant to be used point-to-point (or through STP by assigning hardocded routes).