It is clear that the director's decision was based upon the principle H. C. that it was undesirable to allow any competition between the proposed new factory and the existing factories upon the ground that such competition would increase the proportionate overhead charges of the existing factories, which in turn would ultimately reflect itself in smaller payments to the producer.
The appeal board followed a very similar line of reasoning, considering that the interests of the dairymen would or might be prejudicially affected if they were suddenly confronted with the spectacle of an additional purchaser for their milk.
Fortunately for the courts, and perhaps also for the appeal board, the validity of this economic reasoning is not open to review. The only question for us is whether the board's decision was vitiated by its consideration of irrelevant matters. If so, the form of the statutory provision-that a certificate shall not be issued "unless " etc.--is no bar to the issue of a mandamus to hear and determine, as distinct from a mandamus to issue a certificate.
Were the matters which influenced the board's decision relevant ? Under the statute, the sole issue for its determination was whether
it is in the best interests of the industry that the same should be registered, having regard to the situation and environment of the premises proposed to be registered."
The question is: Does the phrase "having regard to " state exhaustively, and SO define and limit, the considerations which are relevant ? Or does the phrase merely require that " the situation and environment" of the proposed premises must be considered in addition to any other factors which may have a bearing on " the best interests of the industry' " ?
In my opinion, the phrase 'having regard to," used as it is in reference to the very grounds of decision of an administrative authority, introduces an exclusive specification of the relevant factors to be taken into account. Indeed, the phrase "having regard to " may be paraphrased as "treating the following as the relevant factors." As Crisp J. says, "the director is not asked to concern himself with any other considerations. If the intention had been to give him a free hand in every respect it would have been simple to say so."