diff --git a/plugin-designs/my-upg-100-list/data/adm0/PROVENANCE.json b/plugin-designs/my-upg-100-list/data/adm0/PROVENANCE.json
index 7a273f255..bff75663b 100644
--- a/plugin-designs/my-upg-100-list/data/adm0/PROVENANCE.json
+++ b/plugin-designs/my-upg-100-list/data/adm0/PROVENANCE.json
@@ -5,8 +5,197 @@
   "endpoint": "https://www.geoboundaries.org/api/current/gbOpen/<ISO3>/<LEVEL>/",
   "note": "gbOpen passes through each country UPSTREAM licence — this collection is MIXED-LICENCE with per-country attribution duties.",
   "adm0_features": 162,
-  "_duty": "130 of the 162 countries carry an ATTRIBUTION or SHARE-ALIKE duty that travels with any redistribution of boundaries/world-adm0*.geojson. Only 32 are duty-free (Public Domain or CC0). This matters because the repo is intended to be given away: CC BY obligations are not discharged by shipping the file, they are discharged by naming the source. See data/boundaries/ATTRIBUTION.",
-  "_shareAlike": "These 7 are ShareAlike, a STRONGER duty than attribution — a derivative may have to be licensed alike. Flagged separately because a blanket 'CC BY' summary would hide them: AGO, GAB, GEO, GIN, MMR, NER, TUR",
+  "_duty": "130 of the 162 countries carry a duty that travels with any redistribution of boundaries/world-adm0*.geojson; only 32 are duty-free. The 130 split TWO ways and the split matters more than the total: 65 are attribution-only, and 65 are SHARE-ALIKE CLASS (58 ODbL + 7 explicit ShareAlike), which can constrain how a derivative is licensed rather than merely how it is credited. See _duty_classes. This matters because the repo is intended to be given away: these obligations are not discharged by shipping the file. See data/boundaries/ATTRIBUTION, which references this table by path.",
+  "_duty_classes": {
+    "_why": "THREE CLASSES, NOT TWO — corrected 2026-09-28 after regions-plugin's challenge, which was right. I first gave only the 7 explicitly-named ShareAlike countries their own field on the reasoning that share-alike is a stronger duty than attribution. By that same reasoning the field should hold 65: Open Data Commons ODbL 1.0 is itself a SHARE-ALIKE licence for databases — alongside attribution it requires a Derivative Database be offered under ODbL, and it has a keep-open provision. Separating 7 from 58 buried exactly the thing the field existed to surface.",
+    "_precedent": "THIS REPO ALREADY TREATS ODbL AS CONSEQUENTIAL, which is the evidence rather than my reading of the licence: library/scripts/posters/data/README.md:36-50 records that Natural Earth's 1:10m ROADS were requested and DELIBERATELY NOT SHIPPED because of an ODbL attribution obligation. Someone here dropped a dataset over this class of duty.",
+    "_open": "NOT A LEGAL CONCLUSION. Whether a redistributed boundary file is a 'Derivative Database' under ODbL is exactly the clause a giveaway needs a real answer on, and neither regions-plugin nor I is qualified to give it. Recorded here, and raised with the licensing items, so the question is visible rather than settled by omission.",
+    "duty_free": {
+      "count": 32,
+      "iso3": [
+        "AFG",
+        "ALB",
+        "AND",
+        "ARE",
+        "ATG",
+        "BEN",
+        "BGD",
+        "BGR",
+        "BHS",
+        "BIH",
+        "BOL",
+        "BRN",
+        "CHN",
+        "CIV",
+        "COL",
+        "DJI",
+        "ECU",
+        "GHA",
+        "IND",
+        "IRN",
+        "IRQ",
+        "JAM",
+        "KEN",
+        "LBN",
+        "LBY",
+        "LCA",
+        "MLT",
+        "PAN",
+        "PER",
+        "SLB",
+        "USA",
+        "VEN"
+      ]
+    },
+    "attribution_only": {
+      "count": 65,
+      "iso3": [
+        "ABW",
+        "ARM",
+        "ASM",
+        "AZE",
+        "BFA",
+        "BLM",
+        "BLR",
+        "BMU",
+        "BRA",
+        "BRB",
+        "BTN",
+        "CAF",
+        "CMR",
+        "COK",
+        "CUW",
+        "CYM",
+        "CZE",
+        "DMA",
+        "ESP",
+        "FRO",
+        "FSM",
+        "GGY",
+        "GLP",
+        "GMB",
+        "GRC",
+        "GUF",
+        "GUM",
+        "GUY",
+        "ISL",
+        "JOR",
+        "JPN",
+        "LBR",
+        "MDV",
+        "MLI",
+        "MNP",
+        "MRT",
+        "MSR",
+        "MYT",
+        "NAM",
+        "NCL",
+        "NGA",
+        "NIU",
+        "NPL",
+        "NZL",
+        "PHL",
+        "PRK",
+        "PRY",
+        "PSE",
+        "PYF",
+        "SDN",
+        "SEN",
+        "SHN",
+        "SLE",
+        "SOM",
+        "SSD",
+        "SWE",
+        "TCA",
+        "TZA",
+        "VGB",
+        "VIR",
+        "VNM",
+        "WLF",
+        "ZAF",
+        "ZMB",
+        "ZWE"
+      ]
+    },
+    "share_alike_class": {
+      "count": 65,
+      "odbl_1_0": {
+        "count": 58,
+        "iso3": [
+          "BHR",
+          "COD",
+          "COG",
+          "COM",
+          "CUB",
+          "CYP",
+          "DZA",
+          "EGY",
+          "ERI",
+          "ETH",
+          "FIN",
+          "FJI",
+          "GNB",
+          "GNQ",
+          "GRD",
+          "IDN",
+          "ISR",
+          "KAZ",
+          "KGZ",
+          "KHM",
+          "KIR",
+          "KWT",
+          "LAO",
+          "LIE",
+          "LKA",
+          "LUX",
+          "MAR",
+          "MHL",
+          "MNE",
+          "MNG",
+          "MOZ",
+          "MUS",
+          "MWI",
+          "MYS",
+          "OMN",
+          "PAK",
+          "PLW",
+          "PNG",
+          "QAT",
+          "RUS",
+          "SAU",
+          "SMR",
+          "STP",
+          "SUR",
+          "SWZ",
+          "SYR",
+          "TCD",
+          "TGO",
+          "THA",
+          "TJK",
+          "TON",
+          "TUN",
+          "UGA",
+          "UZB",
+          "VCT",
+          "VUT",
+          "WSM",
+          "YEM"
+        ]
+      },
+      "explicit_sharealike": {
+        "count": 7,
+        "iso3": [
+          "AGO",
+          "GAB",
+          "GEO",
+          "GIN",
+          "MMR",
+          "NER",
+          "TUR"
+        ]
+      }
+    }
+  },
   "summary": {
     "countries": 162,
     "duty_free": 32,