If:
(a) an arrangement, when considered by itself, does not constitute a derivative, or some other kind of financial product; and
(b) that arrangement, and one or more other arrangements, if they had instead been a single arrangement, would have constituted a derivative or other financial product; and
(c) it is reasonable to assume that the parties to the arrangements regard them as constituting a single scheme;
the arrangements are, for the purposes of this Part, to be treated as if they together constituted a single arrangement.