[35] The construction of s 5(b) of the CLA which I would adopt fully accords with this statement of intention. On that construction, the exclusion is not limited to cases where the employer of the injured worker is a defendant; in some instances the exclusion will cover claims against persons other than an employer. At the same time, however, in order to fall within the exclusion, it must be possible to say that the claim against a person other than an employer is truly a claim in relation to a "work injury". The claim will be such a claim only where it is alleged that the employment was a significant contributory factor to the occurrence of the injury for which the person against whom the claim is made is alleged to be liable. In such circumstances, therefore, it would be possible for a claim against a person other than an employer to be excluded from the coverage of the CLA and, at the same time, excluded from the coverage of the damages provisions of the WCRA, which regulate only damages claims against employers. It may be that the legislature had it in mind that, in practice, it was unlikely that claims for an injury to which employment was alleged to be a significant contributing factor even though the injury was also caused by the fault of a person other than the employer, would not also involve a claim for damages against the employer. It is not profitable, however, to speculate further on the considerations of policy which lay behind the language of the statute.