Upon such volun tary acceptance, the Provisional  Suspension  shall have the full effect and be treated in the same manner a s if the Provisional  Suspension  had been imposed under Article 6.2.1 or 6.2.2; provided, however, at any time after voluntarily accepting a Provisional  Suspension , the Athlete  or other Person  may withdraw such acceptance, in which event the Athlete  or other Person  shall not receive any credit for time previously served during  the Provisional  Suspension .