CESWJ--- that line of reasoning doesn't come from a particular SOP or legal precedent: it just the most common-sense approach that I could think of...What would you do if you personal Puddle jumper had tcas II and that situation occured?
but, I think and hope that your written SOPs would cover the same situation in a very similar manner.
also, remember that TCAS RA's are [in most types] inhibited by EGPWS/Windshear and STALL warnings--- perhaps one day in an extreme situation knowledge of the TCAS priority may be helpful in coming to a decision in the future.
PA