Initial Testing  Procedure  (ITP):  An Analytical  Testing  Procedure  whose purpose is to identify those Samples  which may contain a Prohibited Substance , Metabolite (s) of a Prohibited Substance , or Marker(s)  of the Use of a Prohibited Substance  or Prohibited  Method  or an elevated quantity of a Prohibited Substance , Metabolite (s) of a Prohibited Substance , or Marker (s) of the Use of a Prohibited Substance  or Prohibited Method .