Leave holdings cards in file. Paper clip holdings cards for one title together. If don't check shelf list in Serials Cataloging, or if not found in shelf list in Serials Cataloging, stand holdings cards on end on left side for checking GC later. No call number on the cover card - write it on by hand. However, if there are also no holdings cards, check ICU-released file first.
Holdings are on cover card - treat as a regular cover card.
We will live with the fact that the holdings will be gone for awhile. If not there, treat as a regular cover card. Assume one copy with location where the call number would normally go for now. Storage stamped on the holdings cards but there is also a location under the call number - assume the location is storage, unless it indicates only certain volumes are in storage. Then assume both locations.