Bidders had the opportunity to provide comments on or propose modifications to the Standard Pre-Bid Letter of Credit for each Company with the Part 1 Proposal. On March 15, 2021, the Procurement Administrator posted the final lists of acceptable modifications to the Pre-Bid Letters of Credit to the Final Materials page under each of Appendices 10 through 13. Bidders must either use the Standard Pre-Bid Letter of Credit for a Company, or submit a Pre-Bid Letter of Credit that incorporates only those modifications to the Standard Pre-Bid Letter of Credit approved by that Company and posted to the procurement website.