(1) If a relevant law provides that stated material may or must be considered in working out the meaning of an Act or statutory instrument, that does not by implication prevent other material of the same or similar kind being considered in working out the meaning of the Act or instrument.
(2) In this section:
"relevant law" means—
(a) in working out the meaning of an Act—the Act or another Act; or
(b) in working out the meaning of a statutory instrument made under an Act—the Act, another Act or the instrument; or
(c) in working out
the meaning of a statutory instrument made under another statutory
instrument—an Act or either instrument.