- In cases where the Laboratory  receives three (3) or more urine Samples , which are linked to a single Sample  Collection  Session  from the same Athlete  according to the DCF(s), the Laboratory  shall prioritize the analysis of the first and the subsequent collected Sample with the highest specific gravity (SG), as recorded on the DCF:  [Comment: The Laboratory  may conduct analyses on the additional collect ed Samples, if deemed necessary, with the agreement of the Testing Authority .