When the 'Australian Design Rules' [ADR] were introduced to the automotive industry, Leyland Australia [LA] had to make a few changes to their Mini range, some of which affected the locally produced Cooper 'S'. LA had already customised the doors, dropping the insecure sliding windows and fitting wind-up windows and quarter lights. The 1100/1300 had them, so LA simply resized them to suit the Mini. The doors are uniquely Australian, the only British Leyland [BL] components used are the external hinges. Later the rules forced LA to change the door handles from lever-type to flap-type, with the introduction of their version of the Clubman and the last 100 or so 'S's. The ADR forced a major re-jig of the floor-pan. All underbody lines and cables had to be covered, so LA simply designed a new floor-pan with two channels running full length to contain the fuel, hydrolastic and hydraulic lines, and the battery cable, capped with zinc-plated covers. Hank bushes in the swage-lines each side of the channels provide durable attachment points.
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