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There are no ready tests or invariable formulas to determine whether a provision is mandatory or directory. The broad purpose of the statute is important. The object of the particular provision must be considered. It is the duty of courts of justice to try to get at the real intention of the legislature by carefully attending to the whole scope of the statute to be construed…. That in each case you must look to the subject-matter, consider the importance of the provision and the relation of that provision to the general object intended to be secured by the Act, and upon a review of the case in that aspect decide whether the enactment is what is called imperative or only directory.
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