diff --git a/api-v3/test/unit/f6-1-presentation-territory-source.test.ts b/api-v3/test/unit/f6-1-presentation-territory-source.test.ts
new file mode 100644
index 0000000..a1358bc
--- /dev/null
+++ b/api-v3/test/unit/f6-1-presentation-territory-source.test.ts
@@ -0,0 +1,86 @@
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import test from 'node:test';
+import { F61_PRESENTATION_TERRITORY_SOURCE } from '../../src/reference-data/f6-1-presentation-territory-source';
+
+function key(value: string): string {
+  return value.normalize('NFD')
+    .replace(/[\u0300-\u036f]/g, '')
+    .toLowerCase()
+    .replace(/[^a-z0-9]+/g, ' ')
+    .trim()
+    .replace(/\s+/g, ' ');
+}
+
+test('F6.1 presentation territory snapshot matches the approved spreadsheet cardinalities', () => {
+  const source = F61_PRESENTATION_TERRITORY_SOURCE;
+  const rows = source.rows;
+
+  assert.equal(source.file, 'Tablas de yacimiento y areas(1).xlsx');
+  assert.equal(source.sheet, 'cr26e_tabla1');
+  assert.equal(source.sha256, 'afc8991eed0c0175cf121b6e11e6ca7cc5459ba371c5a186966706e386033cdb');
+  assert.equal(rows.length, 230);
+
+  const areas = new Map<string, typeof rows[number][]>();
+  for (const row of rows) {
+    const id = key(row.area);
+    const current = areas.get(id) ?? [];
+    current.push(row);
+    areas.set(id, current);
+  }
+
+  const pairs = new Set(rows.map((row) => `${key(row.area)}|${key(row.yacimiento)}`));
+  const departments = new Set(rows.map((row) => key(row.departamento)));
+  const companies = new Set(
+    rows
+      .map((row) => row.empresaOperadora)
+      .filter((name) => key(name) !== key('Sin Empresa Operadora'))
+      .map(key),
+  );
+  const areasWithoutOperator = [...areas.values()]
+    .filter((sameArea) => key(sameArea[0]!.empresaOperadora) === key('Sin Empresa Operadora'));
+  const concessions = new Set(rows.map((row) => row.tipoConcesion));
+
+  assert.equal(areas.size, 64);
+  assert.equal(pairs.size, 230);
+  assert.equal(departments.size, 7);
+  assert.equal(companies.size, 12);
+  assert.equal(areasWithoutOperator.length, 17);
+  assert.deepEqual([...concessions].sort((a, b) => a.localeCompare(b, 'es')), ['Exploración', 'Explotación']);
+
+  for (const [area, sameArea] of areas) {
+    assert.equal(new Set(sameArea.map((row) => key(row.departamento))).size, 1, `${area}: Departamento conflictivo`);
+    assert.equal(new Set(sameArea.map((row) => key(row.tipoConcesion))).size, 1, `${area}: concesión conflictiva`);
+    assert.equal(new Set(sameArea.map((row) => key(row.empresaOperadora))).size, 1, `${area}: Operadora conflictiva`);
+  }
+});
+
+test('F6.1 presentation reset preserves system masters and enforces the physical hierarchy', () => {
+  const migration = readFileSync(
+    resolve(process.cwd(), 'src/database/migrations/1790094600000-f6-1-presentation-territory-reset.ts'),
+    'utf8',
+  );
+
+  assert.match(migration, /TRUNCATE TABLE assets CASCADE/);
+  assert.match(migration, /TRUNCATE TABLE audit_events/);
+  assert.doesNotMatch(migration, /TRUNCATE TABLE users/i);
+  assert.doesNotMatch(migration, /TRUNCATE TABLE roles/i);
+  assert.doesNotMatch(migration, /TRUNCATE TABLE permissions/i);
+  assert.doesNotMatch(migration, /TRUNCATE TABLE inventory_families/i);
+  assert.doesNotMatch(migration, /TRUNCATE TABLE finding_catalog_items/i);
+
+  assert.match(migration, /area_company_relations/);
+  assert.match(migration, /area_legal_rights/);
+  assert.match(migration, /key\(row\.empresaOperadora\)!==key\(NO_OPERATOR\)/);
+  for (const contract of [
+    /total_assets:313/,
+    /companies:12/,
+    /departments:7/,
+    /areas:64/,
+    /yacimientos:230/,
+    /legal_rights:64/,
+    /operators:47/,
+    /areas_without_operator:17/,
+  ]) assert.match(migration, contract);
+});