NPIP certification
Participant 41-232 in the USDA National Poultry Improvement Plan. The flock tests clean for Pullorum-Typhoid, which clears it to ship birds and hatching eggs across state lines.
From the NPIP state directories at poultryimprovement.org. Status changes over time; confirm with the seller before you buy. This your flock? Claim the page or write hello@chickenmarketplace.com to have it taken down.