The effect of s. 40 is to provide that no action for contribution shall be brought after the expiration of the first to expire of two periods: two years from the accrual of the right to contribution, by reason of judgment, award or agreement rendering the party seeking contribution liable in the principal action: see sub-s. (2), or four years from the date of the expiration of the period of limitation for the principal action. The first of these periods is inapplicable since the right has not yet accrued. But the second would, if this Queensland legislation had any application to the present case, have expired before the first defendant brought his contribution proceedings. The period of limitation for the principal action would have been three years according to Queensland law: The Law Reform (Limitation of Actions) Act of 1956, s. 5. It accordingly expired in 1974, the accident having occurred in 1971 (it may be noted in passing that had Queensland law been applicable the principal action would itself have been statute barred when instituted in 1977). The further four years which s. 40 allows for the contribution action would have expired in 1978, whereas leave to issue and serve the third party notice on S.G.I.O. was only given in 1979. That these consequences, the barring of the principal action and of the action for contribution, have not in fact ensued is because, assuming that any State statute of limitations is applicable to these High Court proceedings, it will be the Western Australian statute that is in point. That Act, the Limitation Act 1935-1954, would allow a period of six years within which the plaintiff might commence his action - s. 38(1)(c), and, unlike s. 40(1) of the Queensland Act, contains no provision whereby time may run against a claimant for contribution before the right of action for contribution has accrued to him.