select perm_detail.perm_column_value, perm_detail.remarks
into :territorial_scope.country_id, :territorial_scope.display_scope
from perm_detail
join perm_mast
on perm_detail.perm_mast_id = perm_mast.perm_mast_id     --> this is the same ...
where perm_mast.perm_mast_id = perm_detail.perm_mast_id  --> ... as this line
AND perm_mast.branch_id= :PARAMETER.P_BRANCH
AND perm_detail.perm_column_id=100548;

select d.perm_column_value, 
       d.remarks
  into :territorial_scope.country_id, 
       :territorial_scope.display_scope
  from perm_detail d, perm_mast m
  where d.perm_mast_id = m.perm_mast_id
    and m.branch_id    = :parameter.p_branch
    and d.perm_column_id = 100548;