Finally, the Federal Court in Ketua Pengarah Hasil Dalam Negeri v Alcatel-Lucent Malaysia Sdn Bhd & Anor [2017] 1 MLJ 563 explained the disadvantage attendant upon an applicant who files a judicial review proceeding instead of appealing to the SCIT against the assessment as follows: [60] Had the respondents filed an appeal before the Special Commissioners, where the onus is on the respondents to establish their position, they will be accorded every opportunity to show where the appellant went wrong. The respondents may request for the attendance of witnesses to give evidence on oath and request any witness to produce any books, papers or documents which is in his custody or his control necessary for purposes of the appeal. Therefore, before the Special Commissioners the respondents will have all the opportunity to ventilate his disgruntlement, with every opportunity to undo what the appellant determined (see Director-General of Inland Revenue v Lahad Datu Timber Sdn Bhd [1978] 1 MLJ 203). … [64] At the risk of repeating, as there was no appeal to the Special Commissioners, this court has no option but to accept certain facts and conclusions as not reversible (fait accompli). We cannot alter the view that the payments made by the first respondent are royalty payments and now be heard to complain, bearing in mind that they have failed to avail themselves, to echo Gill FJ, ‘of that remedy as laid down by the law’ before coming to the courts. … [69] A judicial review is a court proceeding where a challenge is made on the decision of the relevant authority or entity by challenging the lawfulness of the decision making process. This is trite law. Generally, the court dealing with the judicial review application in a supervisory capacity is not to delve into the merits of the case. In other words, the evidence is not reassessed. The court is merely to quash the decision of the relevant authority, if need be, and not to substitute with what it thinks is the correct decision. We are not here to usurp the powers of the designated authority.