13 As the writ was amended in December 2016, any subsequent amendments to it require the leave of the Court. As the action is proceeding by way of SIFCs rather than formal pleadings, there might, perhaps, be an argument that leave to amend the SIFC at any stage is required. It is unnecessary to decide that question. ICWA has applied for leave to amend, BGNV has opposed the challenged amendments, and, in any event, as counsel for BGNV acknowledged[14] in this case, the same considerations are relevant to the discretion to grant leave, or to disallow an amendment. That is because the challenged amendments are proposed at an early stage, BGNV has not yet filed its SIFC in response to ICWA's SIFC, and there is no claim of consequential delay in the trial, or prejudice to BGNV, if the challenged amendments are made at this stage. Instead, BGNV's opposition to the grant of leave was based solely on its submission that the challenged amendments did not disclose a reasonable cause of action, would prejudice, embarrass or delay the fair trial of the action, or would give rise to an abuse of the process of the Court.