Wallis JA made extensive obiter observations on customary international law regarding head of state immunity, concluding (obiter) that at the current stage of development of customary international law, there is no international crimes exception to the immunity and inviolability that heads of state enjoy when visiting foreign countries and before foreign national courts. He examined the Arrest Warrant case (ICJ), the jurisprudence of the ICC, ECHR decisions, and academic commentary. The judge also made important observations on the proper procedure for applications for admission as amici curiae under Rule 16 of the SCA Rules, including: that admission as amicus does not automatically confer a right to make oral submissions (this is determined by the Court hearing the appeal); that an amicus must advance new contentions distinct from those of the parties; that adding additional references to authorities does not constitute advancing new contentions; and that amici are confined to the record on appeal and generally may not lead additional evidence. Wallis JA also commented critically on the Government's conduct in giving assurances that President Al Bashir was still in the country when he had in fact already departed, describing this as 'disgraceful conduct' and noting there were only two possibilities: either Government representatives misled counsel who misled the Court, or both knowingly misled the Court.