diff --git a/scripts/provision_belgium_building_training_portfolio.py b/scripts/provision_belgium_building_training_portfolio.py
index fd331768..ee0f4e58 100644
--- a/scripts/provision_belgium_building_training_portfolio.py
+++ b/scripts/provision_belgium_building_training_portfolio.py
@@ -134,6 +134,13 @@ AOIS = (
     Aoi("roeselare-parking-industry-v56-bg", "flanders", "parking-industrial-hard-negative", "train", 3.155, 50.960, "background_candidate"),
     Aoi("lommel-tree-road-train-v56-bg", "flanders", "park-road-hard-negative", "train", 5.345, 51.215, "background_candidate"),
     Aoi("nieuwpoort-marina-parking-v56-bg", "flanders", "coastal-parking-hard-negative", "train", 2.770, 51.142, "background_candidate"),
+    # v63 calibration remediation candidates. The former Genk/Lokeren/Oostende
+    # calibration labels failed visual roof-alignment review. These start as
+    # train-role candidates so the immutable holdout rotator can assign only
+    # visually accepted, spatially independent samples to calibration.
+    Aoi("aarschot-mixed-cal-candidate-v63", "flanders", "mixed-urban", "train", 4.837, 50.985),
+    Aoi("beveren-ribbon-cal-candidate-v63", "flanders", "ribbon-development", "train", 4.256, 51.212),
+    Aoi("oostkamp-suburban-cal-candidate-v63", "flanders", "suburban", "train", 3.226, 51.154),
     Aoi("bruges-val", "flanders", "historic-urban", "val", 3.224, 51.209),
     Aoi("turnhout-val", "flanders", "suburban", "val", 4.944, 51.322),
     Aoi("hasselt-cal", "flanders", "suburban", "calibration", 5.340, 50.930),
diff --git a/tests/test_provision_belgium_building_training_portfolio.py b/tests/test_provision_belgium_building_training_portfolio.py
new file mode 100644
index 00000000..bd022031
--- /dev/null
+++ b/tests/test_provision_belgium_building_training_portfolio.py
@@ -0,0 +1,21 @@
+from scripts.provision_belgium_building_training_portfolio import AOIS
+
+
+V63_CANDIDATES = {
+    "aarschot-mixed-cal-candidate-v63",
+    "beveren-ribbon-cal-candidate-v63",
+    "oostkamp-suburban-cal-candidate-v63",
+}
+
+
+def test_portfolio_slugs_are_unique() -> None:
+    slugs = [aoi.slug for aoi in AOIS]
+    assert len(slugs) == len(set(slugs))
+
+
+def test_v63_calibration_candidates_are_flemish_train_role_inputs() -> None:
+    candidates = {aoi.slug: aoi for aoi in AOIS if aoi.slug in V63_CANDIDATES}
+    assert set(candidates) == V63_CANDIDATES
+    assert all(aoi.region == "flanders" for aoi in candidates.values())
+    assert all(aoi.split == "train" for aoi in candidates.values())
+    assert all(aoi.sample_role == "positive" for aoi in candidates.values())