declare
  v_access_level  number;
begin
  select e.employee_level_id  into  v_access_level
   from EMP  e
   where  lower(e.ou_name) = lower ('&USER.');
  if  v_access_level in (1,4)  then
      return  true;
  end if;

 EXCEPTION
      WHEN NO_DATA_FOUND
      THEN
         RETURN false;   
end;

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