Meanwhile Prime Minister Lee Hsien Loong maintained (still maintains) that the Constitution does not require him to call a by-election within any time frame. Lawyers and academics weighed in with their expert opinions, but Madam Vellama acted.
- 2 March - Madam Vellama filed an application to get the court to declare that the Prime Minister does not have "unfettered discretion" in deciding whether and when to call a by-election. She also asked the court to issue a mandatory order for him to do so within three months or a "reasonable time";
- 30 March – AG argued in High Court to throw out Vellama’s application, Judge Pillai reserved judgement;
- 3 April – Judge Pillai dismissed AG’s argument to throw out Vellama’s application and fixed date (16 Apr) for hearing of the application to proceed in an open court;
- 4 April – AG filed Notice of Appeal against Judge Pillai’s oral judgment of April 3 and sought an expedited hearing on its appeal;
- 5 April - Mr Ravi argued successfully that the appeal hearing should take place only after Justice Pillai issued his written grounds of decision. The open court hearing, scheduled to take place on April 16, put on hold;
- 10 April – Justice Pillai said he granted leave for Madam Vellama Marie Muthu's application to be heard in open court as he was of the view that the very low threshold for leave has been met, noting:
(i) the matter complained of is susceptible to judicial review;
(ii) the applicant has sufficient interest in the matter; and
(iii) the material before the court discloses an arguable or prima facie case of reasonable suspicion in favour of granting leave;
- 12 April – Judge Phang ordered AG to file its case for appeal by 26 Apr and for Vellama to file her response by 10 May. Hearing fixed in the week commencing 14th May for AG’s appeal to be heard;
- 13 April – Madam Vellama filed application to Court of Appeal to strike out AG’s appeal on procedural ground;
- 17 April – AG’s appeal against Judge Pillai’s decision and Madam Vellama’s application to strike out AG’s appeal are both fixed on 16th May to be heard in Court of Appeal;
On 9 May, PM Lee directed the President to issue the writ of election for the by-election to be held, with polling day set on May 26. Nomination day 16th May, also happens to be the date scheduled for the Court of Appeal hearing.