Since section 13 is intended to protect funds or other property of
all plans involved, bonds under this section shall allow for enforcement
or recovery by those persons usually authorized to act for such plans in
such matters. In most cases, the naming of the plan or plans as insured
will provide for such recovery. Where it is not clear that such recovery
will be provided, however, a rider shall be attached to the bond or
separate agreement made among the parties concerned to make certain that
any reimbursement collected under the bond will be for the benefit and
use of the plan suffering a loss. Such rider or agreement shall always
be required as respects any bond (a) where the employer or employee
organization is first named joint insured with one or more plans, or (b)
two or more plans are named joint insureds under a single bond with the
first named acting for all insureds for the purpose of orderly servicing
of the bond.