Part XVIII, The Recommended Settlement

Resolved design decisions. Parts 0-XVII set out the framework and its principles; this Part takes every choice that framework deliberately left open and gives it a single, decisive, reasoned answer, so the model has no blanks. Each resolution is the model's authoritative recommendation, derived from the objective (§0.2) and axioms (§0.3), and is ratified by the people at Referendum 2 (§XV.2). "Ends from the people" is preserved, the people confirm or vary it, but the design itself is now complete and decisive, not a set of placeholders.

D0, How to read this Part

For each previously-open item: the decision, the first-principles rationale (why this is the right answer on the model's own principles, not merely an answer), and the home Part it makes concrete. Where a quantity must adapt over time (e.g. immigration levels), the principled answer is a mechanism, not a frozen number, fixing such a number would itself be a design error.

D1, The Expert Layer domain map (makes §IV.2 concrete)

Decision. Ten domains, each a coherent body of assessable expertise with published scope and named interfaces:

1. Economy & Finance, fiscal execution within mandate (monetary policy stays independent, §X.5)
2. Health & Care
3. Education & Skills
4. Infrastructure, transport, energy, housing, water, digital
5. Environment & Climate
6. Defence & National Security, under civilian/Charter control (Part XII)
7. Justice & Home Affairs, courts administration, policing policy, immigration administration
8. Science, Technology & Innovation
9. Foreign Affairs & Trade
10. Social Security & Welfare

A standing cross-domain coordination function manages interfaces and feeds the arbitration process (§V.5).

Rationale. This carves the whole work of a modern state into coherent expertise areas with minimal overlap and clear interfaces, satisfying "means from the competent" (§0.5) and Axiom 14 (minimal sufficient complexity). The Assembly may add, merge, or split domains (experts never expand their own remit, §IV.6), but this is the recommended baseline.

D2, The Head of State (makes §IX.3 concrete)

Decision. An elected, non-executive Head of State (a ceremonial President): chosen by the people, a single fixed term of 6 years, non-renewable, strictly non-partisan, holding zero governing power. Functions are ceremonial, representative, and limited to a narrow "guardian of the constitution" alarm role, convene the legislature, refer a suspected Charter breach to the Constitutional Court, and formally affirm (not decide) the outcomes of due process. No veto, no policy, no command.

Rationale. Sovereignty rests with the people (Axiom 1), all power is delegated and revocable (Axiom 1, 8), and no governing authority may be hereditary or perpetual (§I.2). A clean-slate design that rejects inherited forms (§0.1) leans toward an elected, term-limited, powerless unifying figure. Honesty note (this is a flagged value choice, not a forced derivation): because a zero-power hereditary office is also compatible (below), the axioms — which are about authority — cannot by themselves decide between two zero-authority options; the choice between an elected ceremonial President and a zero-power ceremonial monarch is at root a value choice (§V.4's rights/moral limb). So this is a recommendation flagged for the people, not a first-principles derivation. The people may instead retain a strictly ceremonial monarchy with identical (zero) powers; that remains fully compatible with the model.

D3, The second chamber: the Citizens' Sortition Chamber (makes §IX.2 / §XI.4 concrete)

Decision. A single second chamber selected by stratified lot:

• ~400 members, selected by lot stratified to be demographically representative and proportional to the four nations and the regions (so territorial representation is built in without a third chamber).
• Fixed term ~2 years, staggered, non-renewable, professionally paid, expert-briefed.
• Powers: scrutinise legislation; require reconsideration / suspensory delay (not an absolute veto); deliberate and decide the value trade-offs flagged under §V.4.
• Territorial lock: legislation that materially alters a nation's devolved competence additionally requires that nation's consent (§XI.4), so the nations are protected both by stratified membership and by a substantive check.

Rationale. Election and lot are the only two legitimate ways to select for power; using both, each checking the other, beats either alone (§III.4). Stratified sortition embeds territorial representation while honouring Axiom 14 (no third chamber). The size (~400) is large enough to be statistically representative and deliberative, small enough to function.

D4, Terms, selection, and removal across all offices (makes §IV.5, §IX concrete)

Decision.

Recall. A high-threshold citizen recall of an individual representative for serious misconduct: a verified, distributed petition triggers a recall vote. An accountability backstop between elections, set deliberately hard to prevent vexatious or partisan abuse.

Rationale. Fixed terms remove the executive's power to time elections for advantage; staggering gives continuity without letting one cohort own an institution; term limits prevent entrenchment (Axiom 8). The parliamentary selection of the Head of Government (rather than a separately-elected president) keeps the executive accountable to the legislature and avoids the dual-mandate conflict and personalisation that direct election invites; the constructive no-confidence rule (must name a successor) gives removability without instability.

D5, Voting and participation rules (makes Part II / III concrete)

Decision.

• Voting age 16 (already set, §II.2), with mandatory civic education.
• Compulsory voting: no. Voting is a civic duty, not a legal compulsion. Instead, turnout is maximised by automatic registration, easy multi-channel voting (in person, post, verifiable digital), and civic education.
• District magnitude: default 5-seat constituencies, varying 4-7 by geography (sparse rural → 4; dense urban → up to 7), population-equal within ±5%, drawn by the Independent Boundary Authority on open, reproducible criteria that must pass gerrymander tests (efficiency gap, partisan symmetry), reviewed each decade (§III.5).

Rationale. Compulsion is a real liberty cost (the qualified rights of §I.3) and the better lever is enabling participation, not penalising abstention, consistent with maximising consent without coercion. A default magnitude of 5 is the sweet spot between proportionality (higher magnitude) and local linkage (lower) identified in the electoral literature.

D6, The fiscal settlement (makes §X.4 / §X.6 concrete)

Decision (recommended defaults, judged by the Independent Fiscal Authority, §X.5):

• Current-budget rule: the structural (cyclically-adjusted) current budget in balance over a rolling 5-year horizon.
• Debt anchor: net public-sector debt on a declining path as a share of GDP over the medium term (falling by year 5 of the forecast).
• Investment ("golden") rule: borrowing permitted for productive investment that passes an independent value-for-money and intergenerational-benefit test, so the debt rule never starves the future of infrastructure.
• Escape clause: activated only on an independently-verified severe shock (deep recession, war, disaster); auto-sunset; mandatory costed return-to-target plan (§X.9).
• Long-term fund: receives resource/windfall revenues plus a fixed share of structural surpluses; sustainable real drawdown capped (~3%/yr of fund value); constitutionally ring-fenced (§X.6).

Rationale. This pairs hard discipline on consumption debt with protection of investment, the failure of crude debt brakes is that they cut investment first. Independent verification (not the government's own numbers) and the intergenerational test operationalise Axiom 13. Honesty note (a flagged value choice): the specific fiscal stance — balance the current budget over five years, a declining debt path — is a contestable distributional and present-vs-future value choice, exactly the kind D7 refuses to fix for immigration. So D6 fixes the mechanism (independent scoring, the intergenerational test, escape-clause discipline and return-to-rule floors) and flags the stance as a value choice for democratic decision (§V.4), rather than baking one school's macro-doctrine into the settlement. The IFA scores; it does not veto (§X.5).

D7, The immigration mechanism (makes §XIII.4 concrete)

Decision. The right answer is a mechanism, not a fixed number (a frozen number would be a design error, needs change):

• An independent Migration Advisory body publishes evidence on capacity, needs, and impacts, and recommends ranges.
• The Assembly sets the level and criteria democratically each period, within the rights floors of §XIII.4 (due process, no inhuman treatment, asylum/humanitarian obligations).
• Administration is transparent, points/needs-based, consistent, and appealable (Part V standards).

Rationale. The quantum of immigration is a legitimate, recurring democratic value choice (§0.5) that must adapt to circumstances; the system around it, evidence in, democratic decision, rights floors, fair process, is what the model fixes. Fixing a permanent number would violate both adaptability (Axiom 10) and "ends from the people."

D8, The digital identity & voting stack (makes §VIII.2 / §VIII.3 concrete)

Decision (recommended architecture, subject to audit and pilot, §XV.4):

• Decentralised verifiable credentials (W3C-VC-style) held in a citizen wallet, with a first-class offline smartcard (equivalent in rights; with the honest caveat that assisted/offline voting trades some individual cryptographic verification for access, §VIII.3).
• Selective disclosure + zero-knowledge proofs (e.g. BBS+ / ZK signatures) for unlinkable eligibility proofs; no central activity database — the de-duplicated, geographically-apportioned petition and stratified-sortition protocols run without a linkable per-citizen record (§VIII.2, §II.3).
• Issuer separated from all relying parties, with multi-party issuance and a publicly-reconciled roll so the issuer is not the demos chokepoint (§VIII.2); per-domain unlinkable credentials.
• Threshold recovery from disjoint trust domains, rate-limited and logged, with cooling-off and an out-of-band confirmation, plus a purely institutional path needing no social guardians (which the isolated and homeless lack); no master backdoor (§VIII.2).
• Voting: an end-to-end-verifiable scheme of the audited open-source family (e.g. ElectionGuard / Belenios lineage), receipt-free, software-independent, paper-backed, with mandatory risk-limiting audits (§VIII.3).
• All critical components open-source, reproducibly built, and independently audited; formal verification scoped to a defined critical kernel (the tally, ledger-integrity core, and uniqueness check, §VIII.6) — never claimed across the whole software estate, and paired with a funded defensive programme (§VIII.8).

Rationale. This is the only known architecture that satisfies all four identity requirements at once (sybil-resistant, privacy-preserving, inclusive, verifiable, §VIII.1) plus the verifiable-voting properties, while honouring the honest engineering boundary on remote voting (§VIII.3). It is specified as properties + a recommended family, not a single product, to avoid vendor lock-in (§VIII.8).

D9, The rubric weights (makes §0.4 concrete)

Decision. The §0.4 weights stand as published (legitimacy/outcomes/rights/capture-resistance at 12% each, etc.). They are versioned and may be revised through public/expert deliberation, but the recommended settlement adopts them as-is.

Rationale. The weights encode the model's core claim, that legitimacy, outcomes, rights, and capture-resistance are co-equal and must not be traded against each other (§0.4). Honesty note (a mechanism, not a frozen default): the weights are the most value-laden numbers in the model — they define what "doing well" means and drive the entire self-score — so, consistent with D0's own rule that value-laden quantities get a mechanism not a frozen number, the settlement fixes the mechanism for setting and revising them (public/expert deliberation plus the independent-scorer process, §0.4.1) and adopts the current weights only as the starting values pending that ratification, published with the score's sensitivity to alternative weightings. This removes the inconsistency with D7 (which fixes a mechanism, not an immigration number).

D10, Effect on the score

Resolving these items makes the design complete and decisive, there are no remaining blanks. Resolving them does not, by itself, move the score: completeness was never what held it below 10. The current §XVII score of ~8.8/10 reflects the things no paper design can honestly claim, 1. Outcome quality (8/10): provable only once the system actually runs (§XVII.3.1);

1. Simplicity (7/10): an inherent trade-off of a complete governing system, mitigated but not erased (§XVII.3.4).

A self-declared 10/10 would breach the model's own honesty rule (§0.6.5). The design is now complete and decisive; the residual ~1.2 points are the honest distance any real system must travel by operating well, measured continuously and in public (§XVII.5), not by writing more pages.

Part XVIII ends. The rulebook is now complete and decisive: principles, institutions, the wider constitution, implementation, adversarial defence, an honest score, and concrete resolutions for every open choice. See README.md for the full structure.