In addition, the period of Ineligibility  calculated under this Article 10.2.4.1 may be reduced to one (1) month if the  40  [Comment to Article 10.2.1.1: While it is theoretically possible for an Athlete or other Person to establish that the anti -doping rule violation was no t intentional without showing ho w the Prohibited Substance entered one’s system, it is highly unlikely that in a doping case under Article 2.1 an Athlete will be successful in proving that the Athlete acted unintentionally without establishing the source o f the Prohibited Substance.]