What are the grounds and majorities for impeachment of the Chief Justice?

The courts' institutional and individual autonomy to decide according to law, without fear or favour — the rule of law's organ (Unit 4) and the separation of powers' third leg (Unit 5). The 2015 Constitution's six guarantees (the exam list): Institutional: the Supreme Court as court of record with the final power to interpret the Constitution and law (Article 128(2)), all other courts under it, and its interpretations and legal principles binding on all (128(3) — the precedent rule constitutionalised); Appointment security: the dual track — the CJ by the President on the Constitutional Council's recommendation; SC justices on the Judicial Council's (129(2)); High Court and district judges by the CJ on the Judicial Council's recommendation (140(1), 149(1)) — the executive kept out of the appointments' chain of command; Tenure-and-removal security: CJ's 6-year term (129(4)); SC judges to 65 (131(2)); removal only by parliamentary impeachment (Article 101) or incapacity recommendation — never by executive displeasure; Salary-and-conditions security: remuneration not alterable to their disadvantage (130(4)) — the economic-emergency proviso the sole crack; Functional walls: no other assignment while in office (132 — the judicial-inquiry deputation proviso excepted); the retired CJ/SC justice's no-pleading rule (135) — no advocacy, no mediation: the Chinese-walls clause; The oversight machinery: the Judicial Council's file-access-and-inquiry powers over complaints (153(4)–(5)). The critique (the honest close): the CC's political…