This requirement is governed by the Procurement Integrity Act and FAR 3.104, so all communications must stay within authorized contracting channels. Responsive bidders must submit a signed, completed solicitation via email or fax, with electronic submission also available through SAM.gov. Quotes should include contractor POC and cage code, FOB Destination pricing, manufacturer name/address/country and part number, and lead time or delivery date, along with required clause checkboxes. If NIST SP 800-171 applies, the awardee must have a current assessment under DFARS 252.204-7019; COTS items are exempt but must be identified to the contracting officer during the solicitation period.