given the nature of the specified location)  to try to locate the Athlete , short of giving the Athlete any advance notice of the test; [Comment to Article B.2.4(c): Due to the fact that the making of a telephone call is discretionary rather than mandatory, and is left entirely to the absolute discretion of the Sample Collection Authority, proof that a telephone call was made is not a requisite element of a Missed Test, and the lack of a telephone call does not give the Athlete a defense to the assertion of a Missed Test.]