diff --git a/backend/tests/test_sprint199_reviewed_accuracy_expansion.py b/backend/tests/test_sprint199_reviewed_accuracy_expansion.py
new file mode 100644
index 00000000..c4e62e7b
--- /dev/null
+++ b/backend/tests/test_sprint199_reviewed_accuracy_expansion.py
@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+import importlib.util
+import math
+from pathlib import Path
+import sys
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def load_sample_preparer():
+    script_path = ROOT / "scripts" / "prepare_operator_real_data_samples.py"
+    spec = importlib.util.spec_from_file_location("reviewed_accuracy_samples", script_path)
+    assert spec is not None
+    assert spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = module
+    spec.loader.exec_module(module)
+    return module
+
+
+def distance_m(left, right) -> float:
+    radius_m = 6_371_008.8
+    left_lat = math.radians(left.center_lat)
+    right_lat = math.radians(right.center_lat)
+    delta_lat = right_lat - left_lat
+    delta_lon = math.radians(right.center_lon - left.center_lon)
+    haversine = (
+        math.sin(delta_lat / 2) ** 2
+        + math.cos(left_lat) * math.cos(right_lat) * math.sin(delta_lon / 2) ** 2
+    )
+    return 2 * radius_m * math.asin(math.sqrt(haversine))
+
+
+def test_reviewed_accuracy_expansion_is_training_only_and_holdout_separated() -> None:
+    module = load_sample_preparer()
+    expected = {
+        "arendonk_center",
+        "dessel_center",
+        "meerhout_center",
+        "laakdal_center",
+        "nijlen_center",
+        "hulshout_center",
+    }
+    protected_holdouts = {
+        "turnhout",
+        "retie",
+        "westerlo",
+        "vosselaar_center",
+        "grobbendonk_center",
+        *module.MOL_OPERATIONAL_VALIDATION_SAMPLE_SLUGS,
+    }
+
+    assert module.REVIEWED_ACCURACY_EXPANSION_SAMPLE_SLUGS == frozenset(expected)
+    assert expected.isdisjoint(module.DEFAULT_VALIDATION_SAMPLE_SLUGS)
+    assert protected_holdouts.issubset(module.DEFAULT_VALIDATION_SAMPLE_SLUGS)
+
+    for slug in expected:
+        sample = module.SAMPLES[slug]
+        assert sample.sample_role == "reference"
+        assert sample.allow_empty_reference is False
+        assert sample.operational_zone == "reviewed_accuracy_training"
+        assert sample.municipality
+        assert module.recommended_split_for_sample(sample) == "train"
+        assert min(
+            distance_m(sample, module.SAMPLES[holdout_slug])
+            for holdout_slug in protected_holdouts
+        ) >= 2_000
+
+
+def test_reviewed_accuracy_expansion_centers_are_unique() -> None:
+    module = load_sample_preparer()
+    samples = [module.SAMPLES[slug] for slug in module.REVIEWED_ACCURACY_EXPANSION_SAMPLE_SLUGS]
+    centers = {(sample.center_lon, sample.center_lat) for sample in samples}
+    municipalities = {sample.municipality for sample in samples}
+
+    assert len(centers) == len(samples)
+    assert len(municipalities) == len(samples)
diff --git a/scripts/prepare_operator_real_data_samples.py b/scripts/prepare_operator_real_data_samples.py
index f775810f..253a339f 100644
--- a/scripts/prepare_operator_real_data_samples.py
+++ b/scripts/prepare_operator_real_data_samples.py
@@ -31,6 +31,16 @@ TRAINING_EXPANSION_SAMPLE_SLUGS = frozenset(
 SMALL_BUILDING_TRAINING_SAMPLE_SLUGS = frozenset(
     {"beerse_center", "rijkevorsel_center", "hoogstraten_center", "vorselaar_center"}
 )
+REVIEWED_ACCURACY_EXPANSION_SAMPLE_SLUGS = frozenset(
+    {
+        "arendonk_center",
+        "dessel_center",
+        "meerhout_center",
+        "laakdal_center",
+        "nijlen_center",
+        "hulshout_center",
+    }
+)
 SMALL_BUILDING_VALIDATION_SAMPLE_SLUGS = frozenset(
     {"vosselaar_center", "grobbendonk_center"}
 )
@@ -204,6 +214,54 @@ SAMPLES: dict[str, OperatorSample] = {
         center_lon=4.7731,
         center_lat=51.2020,
     ),
+    "arendonk_center": OperatorSample(
+        slug="arendonk_center",
+        display_name="Arendonk center reviewed accuracy expansion",
+        center_lon=5.0864557,
+        center_lat=51.3202315,
+        municipality="Arendonk",
+        operational_zone="reviewed_accuracy_training",
+    ),
+    "dessel_center": OperatorSample(
+        slug="dessel_center",
+        display_name="Dessel center reviewed accuracy expansion",
+        center_lon=5.1128221,
+        center_lat=51.2390765,
+        municipality="Dessel",
+        operational_zone="reviewed_accuracy_training",
+    ),
+    "meerhout_center": OperatorSample(
+        slug="meerhout_center",
+        display_name="Meerhout center reviewed accuracy expansion",
+        center_lon=5.0772388,
+        center_lat=51.1317433,
+        municipality="Meerhout",
+        operational_zone="reviewed_accuracy_training",
+    ),
+    "laakdal_center": OperatorSample(
+        slug="laakdal_center",
+        display_name="Laakdal center reviewed accuracy expansion",
+        center_lon=4.9552253,
+        center_lat=51.0801317,
+        municipality="Laakdal",
+        operational_zone="reviewed_accuracy_training",
+    ),
+    "nijlen_center": OperatorSample(
+        slug="nijlen_center",
+        display_name="Nijlen center reviewed accuracy expansion",
+        center_lon=4.6702859,
+        center_lat=51.1610023,
+        municipality="Nijlen",
+        operational_zone="reviewed_accuracy_training",
+    ),
+    "hulshout_center": OperatorSample(
+        slug="hulshout_center",
+        display_name="Hulshout center reviewed accuracy expansion",
+        center_lon=4.7885461,
+        center_lat=51.0753923,
+        municipality="Hulshout",
+        operational_zone="reviewed_accuracy_training",
+    ),
     "vosselaar_center": OperatorSample(
         slug="vosselaar_center",
         display_name="Vosselaar center small-building validation",
@@ -753,6 +811,7 @@ def main() -> int:
         "reference_max_features": args.reference_max_features,
         "default_validation_sample_slugs": sorted(DEFAULT_VALIDATION_SAMPLE_SLUGS),
         "training_expansion_sample_slugs": sorted(TRAINING_EXPANSION_SAMPLE_SLUGS),
+        "reviewed_accuracy_expansion_sample_slugs": sorted(REVIEWED_ACCURACY_EXPANSION_SAMPLE_SLUGS),
         "samples": samples,
     }
     manifest_path = output_dir / args.manifest_name