7.4.3  Opportunity for Hearing or Appeal  Notwithstanding  Articles 7.4.1 and 7.4.2, a Provisional Susp ension  may not be imposed unless the Athlete  or other Person  is provided with:  (a) an opportunity for a Provisional Hearing , either before imposition of the Provisional Suspension  or on a timely basis after imposition of the Provisional Suspension ; or (b) an opp ortunity for an expedited hearing in accordance with Article 8 on a timely basis after imposition of a Provisional Suspension .