Description of alter_audit_policy

ALTER AUDIT POLICY policy
  [ ADD [ privilege_audit_clause ] [ action_audit_clause ] [ role_audit_clause ] ]
  [ DROP [ privilege_audit_clause ] [ action_audit_clause ] [ role_audit_clause ] ]
  [ CONDITION { DROP | 'audit_condition' 
    EVALUATE PER { STATEMENT  | SESSION | INSTANCE } } ]
  [ ONLY TOPLEVEL ]
;