Thanks, and although your response is correct for my question "any year", the IBC has ommitted that portion of the code in the subsequent editions; The masonry project I'm currently working on is governed by the 2006 IBC, which, like the 03 edition references to ACI 530, ASCE 5 and TMS 402. The only help I've found from these references is L/600 or 0.3" max., which as explained, I interpret as being applicable for the design of lintel or other structural members supporting masonry gravity loads.
Note F, from table 1604.3 minimizes offers some relief from the stringent L/600 criteria, but even L/420 (.7 x L/600) for out of plane deflections seems a bit excessive.
Thanks again, and I'm still reading up on the matter.