SPV-90: Can co-located systems still be considered as separate systems for the purposes of bidding?

Systems that are co-located can still be considered to be separate systems for purposes of bidding in the procurement events as long as each system has its own separate revenue quality meter and has its own identifier in the applicable tracking system (GATS or MRETs). If the new modules to which you refer in your question satisfy those conditions then they can be part of a bid in the procurement event.