Governance is recorded as either Roles or Policies. All of it is changeable with data on a cycle-by-cycle cadence, at open, facilitated Governance Meetings. Policies apply to teams that create them, and to any sub-teams. Everything else is up to your best judgement.
Four things to reconsider about Holacracy: confusing word choices, a legalistic constitution; heavy dogma; a closed-source codebase.
Four key things to keep from years practicing Holacracy: Rule of Law; Continuous Participatory Reorganization; Structured Decisions; Defined Output Formats.