Given a system-wide risk-budget approach that already tends to favor health-first artificial-gravity orbitals and small, tightly chartered lunar outposts, what concrete threshold tests (in terms of per-resident health risk, audited self-sustainment, and domination indices) should a proposed Mars surface project have to pass before regulators even consider granting a city-scale license, and how should these thresholds differ between (a) purely research bases, (b) mixed refuge–industry hubs, and (c) proto-polities aiming at long-term demographic autonomy?

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Answer

Set simple, location-adjusted gates: Mars city proposals only enter licensing if they clear strict numeric floors on health risk, self-sustainment, and non-domination that are tighter than today’s best estimates and stricter for proto-polities than for research bases.

  1. Common Mars pre-licensing thresholds (all types)

  • Health risk per resident-year vs. AG orbital benchmark (H_AG): • Lifetime excess mortality: ≤ 2× H_AG; serious morbidity (e.g., major organ damage, severe psych disorders): ≤ 3× H_AG. • Radiation: ≥ 90% of residents below +0.5 Sv excess over an Earth-remote-worker lifetime; no group above +1 Sv, with conservative models. • Gravity: demonstrated countermeasures (orbital or centrifuge) that keep long-stay adult health within those bounds; no permanent surface-only childhood until separate child-standard met.

  • Audited self-sustainment (S index: share of critical needs met locally for 1 year of isolation): • Life support (air, water, food calories, waste processing): S_LS ≥ 0.7 for a 12‑month cut-off scenario. • Critical spares/repairs (power, pressure hull, LS core, medical basics): S_CRIT ≥ 0.5 for 12 months. • Independent third-party audit with red-team review and full failure-mode tree.

  • Domination / power-concentration (D index, 0–1 where 1 = extreme domination): • No issuance of city-scale license if projected D ≥ 0.35 under stress scenarios. • Hard requirements: legally guaranteed exit rights (funded return), multiple employers/jurisdictions in governance, separated control of life support, policing, and economic management.

  1. Tiered thresholds by project type

A) Purely research bases (small, no city intent)

  • Scale cap: ≤ 500 residents, average stay < 5 years; no birthright citizenship.
  • Health: • Excess mortality ≤ 1.5× H_AG; cumulative dose caps tightened (e.g., +0.3 Sv lifetime excess for most staff). • Mandatory rotation plans; no planned multigenerational residence.
  • Self-sustainment: • S_LS ≥ 0.5, S_CRIT ≥ 0.3 (prioritize safe dependence over high autonomy).
  • Domination: • Target D ≤ 0.25; strong Earth-law reach; single-purpose charter; public or multilateral operator.

B) Mixed refuge–industry hubs

  • Scale: up to low tens of thousands; role as refuge + industrial node.
  • Health: • Excess mortality ≤ 2× H_AG, morbidity ≤ 3×; refuge segment must meet safer sub-cap (e.g., 1.5× H_AG) and be physically/governance-separated from heavy industry. • Clear medevac pathways to orbit/Earth for non-emergency care; monitored mental health programs.
  • Self-sustainment: • For whole site: S_LS ≥ 0.8, S_CRIT ≥ 0.6 for 12 months. • For designated refuge module: S_LS ≥ 0.9, S_CRIT ≥ 0.7 for 24 months, with separate stores and governance.
  • Domination: • Target D ≤ 0.3 overall and ≤ 0.2 inside refuge segment. • Requirements: plural governance (no single firm or state with unilateral LS or exit control), enforceable independent ombuds, binding arbitration under Earth-based courts or multilateral tribunal.

C) Proto-polities aiming at demographic autonomy

  • Scale: open-ended, multigenerational; explicit polity-building intent.
  • Health: • Adult residents: excess mortality ≤ 1.5× H_AG; serious morbidity ≤ 2×. • Children: no license until evidence from orbit/lunar shows developmental risks within high-risk-terrestrial-program bounds; then child-specific cap (e.g., ≤ 1.2× H_AG for key developmental outcomes, strict fertility/pregnancy protocols). • Long-term monitoring and treaty-based right for Earth to halt further population growth if thresholds are breached.
  • Self-sustainment: • S_LS ≥ 0.9, S_CRIT ≥ 0.8 for 24‑month isolation; credible paths (not yet achieved) toward partial closure over decades. • Demonstrated ability to rebuild LS and power from stored spares + local production after a major subsystem loss.
  • Domination: • Target D ≤ 0.25, stress-tested under scenarios of trade breakdown with Earth and internal political crisis. • Conditions: constitutional non-domination guarantees, independent judiciary with external appeal option during first decades, protected minority/exit rights (subsidized return), bans or strict caps on high-risk regulatory-haven industries (frontier AI, advanced bio, opaque finance) until separate global regime.
  1. Relationship to system-wide risk budgets
  • Mars city-scale licenses only considered if: • Aggregate H, E, X draws fit within pre-set system caps where AG orbitals + lunar outposts already use much of the budget. • Proposal shows Mars adds net survival/justice value not achievable by scaling safer AG-orbital–lunar architectures.
  1. Why thresholds differ
  • Research bases: prioritize data, reversibility, and strict caps; allow higher dependence on Earth; very low D and tighter health caps.
  • Mixed hubs: allow higher self-sustainment and industry but firewall refuge function; moderate D with hard structural pluralism.
  • Proto-polities: require strongest self-sustainment and governance proof, plus near-orbital health norms and robust intergenerational rights before large, autonomous growth is allowed.
  1. Use of thresholds in practice
  • These are gating tests for entering a licensing review, not guarantees of approval.
  • Failure on any core metric (health, S indices, or D) at proposal stage implies deferral back to smaller-scale or non-Mars options within the system risk budget.