49 CFR §40.183

1. (a)As the laboratory responsible for testing the split specimen, you must report split specimen test results by checking the “Reconfirmed” box and/or the “Failed to Reconfirm” box (Step 5(b)) on Copy 1 of the CCF, as appropriate, and by providing clarifying remarks using current HHS Mandatory Guidelines requirements.
2. (b)As the laboratory certifying scientist, enter your name, sign, and date the CCF.