definiens: shall mean the twelve - month period beginning on the first dal of each Election Period except for the periods following ( and ncluding ) an Election Period in which Sterling shall have elected to convert the licenses granted to it pursuan t to Section 4.1 and 4.3 to non - exclusive licenses . shall mean Agent Net Sales ( excluding any sales by Schering unless Scherlng shall, during or before the applicable Competing Year, have sold, directly or through licensees or Affiliates, S-095 ) for such competin9 Year in any Cleared Country in which Sterling, or any Affillate thereof, shall have marketed S-095 ( directly or through distributors, agent . or licensees ) since the Intcoduction Date . shall mean Agent Net Sales ( excluding sales by Schering unles ' Schering shall, during or before the applicable Competing Year, have sold, directly or thcough licensees or Affiliates, 5 - 095 ) for the last full four calenda r quarter period ending on or before the Introduction Date in any Cleared Country in which Sterling, or any Affiliate thereof, shall have marketed 5 - 095 ( directly or through distributors, agents or licensees ) since the Introduction Date