Sale-Repurchase of Raw Material-Finished Goods under Advance License. - Customs - Exim - SEZ

Hello, I m having a query regarding raw material imported under advance authorization. Scenario : - Party A has Advance license which has authorized supporting manufacturer as Party B. Party A then enters into agreement with Party B to manufacture finished goods to be transferred exported by Party A only. Party A imports raw material under AA sells the same to Party B for manufacturing. Party A then re-purchases the Finished goods from Party B. Party A carries out the Export Obligation of Finished goods and closes the advance license. P.S: GST has been duly paid on raw material sale from Party A to Party B and again when Party B sells finished goods to Party A. Query: What are the customs law default exposure in such cases? These advance licenses were for 2018-2022 period and up to what period customs can raise queries?