[Comment: Where Tampering or Attempted Tampering  of a Sample can be established by the analyzing Laboratory  based on evidence from that Sample alone (e.g., substitution with another fluid, mixing of urines, addition of proteases to the Sample), the Laboratory  can report the finding as  an AAF or Atypical Finding for Tampering or Attempted Tampering (see Article 4.0 of the TD EAAS [3]).