If you decide to submit a single Part 1 Proposal for a Project, the Bidder and the Seller must be the same entity. If you submit two Part 1 Proposals, each for a different project, then the Bidder and the Seller may be different entities. In the latter case, if you decide not to bid on one of the two Projects, the Bidder and the Seller will remain different entities and no retroactive change to the identity of the Bidder or Seller will be required.