In the attack made by counsel on the validity of the provision, considerable stress was laid on the fact that it appears from the provisions of s. 45D(1), viewed as a whole, that the object of the legislation is to prevent persons from engaging in secondary boycotts. In deciding whether a law is within Commonwealth power it is not permissible to attempt to discover the motives with which the law was enacted. It is necessary to consider what legal operation the law will have, if valid, and if the law has an actual and immediate operation within a field of Commonwealth power, it will be valid notwithstanding that it has another purpose which could not be achieved directly by the exercise of Commonwealth power: see Melbourne Corporation v. The Commonwealth [9] ; Fairfax v. Federal Commissioner of Taxation [10] . As has been shown, the direct legal operation of s. 45D(1)(b)(i), in its relation to trading corporations, is to prohibit persons, acting in concert, from engaging in conduct that would hinder or prevent the supply of goods or services by some other person to a trading corporation, or the acquisition of goods or services by some other person from such a corporation, when the conduct is engaged in for the purpose, and would have or be likely to have the effect, of causing substantial loss or damage to the business of the corporation. It was submitted that the use of the word "business" takes the provision outside the power. "Business" may have a larger meaning than "trade" (Smith v. Anderson [11] ) and may, it was said, extend to anything the corporation does, whether or not in the way of trade. Moreover, it was submitted, the supply of goods and services to a trading corporation, or the acquisition of goods or services from a trading corporation, may take place in the course of business but otherwise than in the course of trade, as, for example, when a trading corporation buys the stationery which it needs for its office. Accordingly, it was said, the protection given by s. 45D(1)(b)(i) is not limited to the trading activities of the corporation, and the provision is not sufficiently relevant to the head of power. It may be accepted that the words "business" and "trade" are not identical in meaning: see Hornsby Shire Council v. Salmar Holdings Pty. Ltd [12] . However, both are wide and general words, and they are not necessarily mutually exclusive in meaning: see Hornsby Shire Council v. Salmar Holdings Pty. Ltd. [13] . In Strickland v. Rocla Concrete Pipes Ltd., Menzies J. appears to have used the terms interchangeably. He said that "a law relating to the trading of trading corporations formed within Australia" is prima facie within power [14] , and later said that "a law governing the conduct of its business by a trading corporation formed within the limits of the Commonwealth is within the power of the Parliament by virtue of s. 51(xx)" [15] . In my opinion, the fact that the provision in question refers to "business" rather than "trade" does not take it outside the power. It is the business of a trading corporation to trade, and its business is its trading. In any case, one could hardly cause substantial loss or damage to the business of a trading corporation without damaging the trading corporation in its trading activities. It would be "narrow or pedantic" (to use the words of Barwick C.J. in Strickland v. Rocla Concrete Pipes Ltd. [16] ) to view the provision now in question as other than a law for the protection of the trading activities of a trading corporation formed within the limits of the Commonwealth. I consider that s. 45D(1)(b)(i) directly operates on the subject matter of the power given by s. 51(xx).