When can a writ petition under Article 226 be entertained against a show cause notice?

Paragraph 10In the present case, the Single Judge arrested the entirety of the proceedings at its inception only, thereby pronouncing upon a controversy which has been statutorily entrusted, in the first instance, to another forum. Nonetheless, despite such a statutory relegation, two narrow doors do exist through which a writ court may entertain a challenge to a show cause notice: i) want of jurisdiction and ii) abuse of jurisdiction (i.e., mala fide exercise of jurisdiction). Where the authority is vested with no power in law to embark upon an enquiry in the first place, the notice issued by such authority is non est. Also, in cases where the power is exercised mala fide or as an abuse of the process of law, the constitutional court may interdict it even at the threshold. However, these are engrafted as exceptions and not as routine measures to litigate every show cause notice under Article 226.