diff --git a/core/src/main/java/org/mobilitydata/gtfsvalidator/notice/ForbiddenGeographyIdNotice.java b/core/src/main/java/org/mobilitydata/gtfsvalidator/notice/ForbiddenGeographyIdNotice.java
new file mode 100644
index 0000000000..41647bbbee
--- /dev/null
+++ b/core/src/main/java/org/mobilitydata/gtfsvalidator/notice/ForbiddenGeographyIdNotice.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2024 MobilityData
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.mobilitydata.gtfsvalidator.notice;
+
+import static org.mobilitydata.gtfsvalidator.annotation.GtfsValidationNotice.SectionRef.FILE_REQUIREMENTS;
+import static org.mobilitydata.gtfsvalidator.notice.SeverityLevel.ERROR;
+
+import org.mobilitydata.gtfsvalidator.annotation.GtfsValidationNotice;
+import org.mobilitydata.gtfsvalidator.annotation.GtfsValidationNotice.SectionRefs;
+
+/**
+ * A stop_time entry has more than one geographical id defined.
+ *
+ * <p>In stop_times.txt, you can have only one of stop_id, location_group_id or location_id defined
+ * for given entry.
+ */
+@GtfsValidationNotice(severity = ERROR, sections = @SectionRefs(FILE_REQUIREMENTS))
+public class ForbiddenGeographyIdNotice extends ValidationNotice {
+
+  /** The row of the faulty record. */
+  private final int csvRowNumber;
+
+  /** The sThe id that already exists. */
+  private final String stopId;
+
+  /** The id that already exists. */
+  private final String locationGroupId;
+
+  /** The id that already exists. */
+  private final String locationId;
+
+  public ForbiddenGeographyIdNotice(
+      int csvRowNumber, String stopId, String locationGroupId, String locationId) {
+    this.csvRowNumber = csvRowNumber;
+    this.stopId = stopId;
+    this.locationGroupId = locationGroupId;
+    this.locationId = locationId;
+  }
+}
diff --git a/main/src/main/java/org/mobilitydata/gtfsvalidator/table/GtfsStopTimeSchema.java b/main/src/main/java/org/mobilitydata/gtfsvalidator/table/GtfsStopTimeSchema.java
index 7f6a05589c..80561fe0ee 100644
--- a/main/src/main/java/org/mobilitydata/gtfsvalidator/table/GtfsStopTimeSchema.java
+++ b/main/src/main/java/org/mobilitydata/gtfsvalidator/table/GtfsStopTimeSchema.java
@@ -52,11 +52,17 @@ public interface GtfsStopTimeSchema extends GtfsEntity {
 
   @FieldType(FieldTypeEnum.ID)
   @Index
-  @Required
+  @ConditionallyRequired
   @ForeignKey(table = "stops.txt", field = "stop_id")
   String stopId();
 
   @FieldType(FieldTypeEnum.ID)
+  @ConditionallyRequired
+  @ForeignKey(table = "location_groups.txt", field = "location_group_id")
+  String locationGroupId();
+
+  @FieldType(FieldTypeEnum.ID)
+  @ConditionallyRequired
   String locationId();
 
   @PrimaryKey(isSequenceUsedForSorting = true, translationRecordIdType = RECORD_SUB_ID)
@@ -67,6 +73,10 @@ public interface GtfsStopTimeSchema extends GtfsEntity {
   @CachedField
   String stopHeadsign();
 
+  GtfsTime startPickupDropOffWindow();
+
+  GtfsTime endPickupDropOffWindow();
+
   GtfsPickupDropOff pickupType();
 
   GtfsPickupDropOff dropOffType();
@@ -83,4 +93,12 @@ public interface GtfsStopTimeSchema extends GtfsEntity {
   @DefaultValue("1")
   @RecommendedColumn
   GtfsStopTimeTimepoint timepoint();
+
+  @FieldType(FieldTypeEnum.ID)
+  @ForeignKey(table = "booking_rules.txt", field = "booking_rule_id")
+  String pickupBookingRuleId();
+
+  @FieldType(FieldTypeEnum.ID)
+  @ForeignKey(table = "booking_rules.txt", field = "booking_rule_id")
+  String dropOffBookingRuleId();
 }
diff --git a/main/src/main/java/org/mobilitydata/gtfsvalidator/validator/StopTimesGeographyIdPresenceValidator.java b/main/src/main/java/org/mobilitydata/gtfsvalidator/validator/StopTimesGeographyIdPresenceValidator.java
new file mode 100644
index 0000000000..72538e1473
--- /dev/null
+++ b/main/src/main/java/org/mobilitydata/gtfsvalidator/validator/StopTimesGeographyIdPresenceValidator.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2024 MobilityData
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.mobilitydata.gtfsvalidator.validator;
+
+import org.mobilitydata.gtfsvalidator.annotation.GtfsValidator;
+import org.mobilitydata.gtfsvalidator.notice.ForbiddenGeographyIdNotice;
+import org.mobilitydata.gtfsvalidator.notice.MissingRequiredFieldNotice;
+import org.mobilitydata.gtfsvalidator.notice.NoticeContainer;
+import org.mobilitydata.gtfsvalidator.table.GtfsStopTime;
+
+/**
+ * Validates that only one of stop_id, location_group_id or location_id is defined in a given record
+ * of stop_times.txt
+ *
+ * <p>Generated notice: {@link MissingRequiredFieldNotice}.
+ *
+ * <p>Generated notice: {@link ForbiddenGeographyIdNotice}.
+ */
+@GtfsValidator
+public class StopTimesGeographyIdPresenceValidator extends SingleEntityValidator<GtfsStopTime> {
+
+  @Override
+  public void validate(GtfsStopTime stopTime, NoticeContainer noticeContainer) {
+    int presenceCount = 0;
+    if (stopTime.hasStopId()) {
+      presenceCount++;
+    }
+    if (stopTime.hasLocationGroupId()) {
+      presenceCount++;
+    }
+
+    if (stopTime.hasLocationId()) {
+      presenceCount++;
+    }
+
+    if (presenceCount == 0) {
+      // None of the 3 geography IDs are present, but we need at least stop_id
+      noticeContainer.addValidationNotice(
+          new MissingRequiredFieldNotice(
+              GtfsStopTime.FILENAME, stopTime.csvRowNumber(), GtfsStopTime.STOP_ID_FIELD_NAME));
+    } else if (presenceCount > 1) {
+      // More than one geography ID is present, but only one is allowed
+      noticeContainer.addValidationNotice(
+          new ForbiddenGeographyIdNotice(
+              stopTime.csvRowNumber(),
+              stopTime.stopId(),
+              stopTime.locationGroupId(),
+              stopTime.locationId()));
+    }
+  }
+}
diff --git a/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/NoticeFieldsTest.java b/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/NoticeFieldsTest.java
index 6eab0628ec..0e55eda83f 100644
--- a/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/NoticeFieldsTest.java
+++ b/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/NoticeFieldsTest.java
@@ -197,7 +197,9 @@ public void testNoticeClassFieldNames() {
             "fileNameA",
             "fileNameB",
             "pathwayMode",
-            "isBidirectional");
+            "isBidirectional",
+            "locationGroupId",
+            "locationId");
   }
 
   private static List<String> discoverValidationNoticeFieldNames() {
diff --git a/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/StopTimesGeographyIdPresenceValidatorTest.java b/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/StopTimesGeographyIdPresenceValidatorTest.java
new file mode 100644
index 0000000000..d03d2be952
--- /dev/null
+++ b/main/src/test/java/org/mobilitydata/gtfsvalidator/validator/StopTimesGeographyIdPresenceValidatorTest.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2020 Google LLC, MobilityData IO
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.mobilitydata.gtfsvalidator.validator;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.util.List;
+import org.junit.Test;
+import org.mobilitydata.gtfsvalidator.notice.ForbiddenGeographyIdNotice;
+import org.mobilitydata.gtfsvalidator.notice.MissingRequiredFieldNotice;
+import org.mobilitydata.gtfsvalidator.notice.NoticeContainer;
+import org.mobilitydata.gtfsvalidator.notice.ValidationNotice;
+import org.mobilitydata.gtfsvalidator.table.GtfsStopTime;
+
+public class StopTimesGeographyIdPresenceValidatorTest {
+
+  @Test
+  public void NoGeographyIdShouldGenerateMissingRequiredFieldNotice() {
+    assertThat(validationNoticesFor(new GtfsStopTime.Builder().setCsvRowNumber(2).build()))
+        .containsExactly(new MissingRequiredFieldNotice("stop_times.txt", 2, "stop_id"));
+  }
+
+  @Test
+  public void OneGeographyIdShouldGenerateNothing() {
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder().setCsvRowNumber(2).setStopId("stop_id").build()))
+        .isEmpty();
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder().setCsvRowNumber(2).setLocationGroupId("id").build()))
+        .isEmpty();
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder().setCsvRowNumber(2).setLocationId("id").build()))
+        .isEmpty();
+  }
+
+  @Test
+  public void MultipleGeographyIdShouldGenerateNotice() {
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder()
+                    .setStopId("stop_id")
+                    .setLocationGroupId("location_group_id")
+                    .setCsvRowNumber(2)
+                    .build()))
+        .containsExactly(new ForbiddenGeographyIdNotice(2, "stop_id", "location_group_id", ""));
+
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder()
+                    .setStopId("stop_id")
+                    .setLocationId("location_id")
+                    .setCsvRowNumber(2)
+                    .build()))
+        .containsExactly(new ForbiddenGeographyIdNotice(2, "stop_id", "", "location_id"));
+
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder()
+                    .setLocationGroupId("location_group_id")
+                    .setLocationId("location_id")
+                    .setCsvRowNumber(2)
+                    .build()))
+        .containsExactly(new ForbiddenGeographyIdNotice(2, "", "location_group_id", "location_id"));
+
+    assertThat(
+            validationNoticesFor(
+                new GtfsStopTime.Builder()
+                    .setStopId("stop_id")
+                    .setLocationGroupId("location_group_id")
+                    .setLocationId("location_id")
+                    .setCsvRowNumber(2)
+                    .build()))
+        .containsExactly(
+            new ForbiddenGeographyIdNotice(2, "stop_id", "location_group_id", "location_id"));
+  }
+
+  private List<ValidationNotice> validationNoticesFor(GtfsStopTime entity) {
+    StopTimesGeographyIdPresenceValidator validator = new StopTimesGeographyIdPresenceValidator();
+    NoticeContainer noticeContainer = new NoticeContainer();
+    validator.validate(entity, noticeContainer);
+    return noticeContainer.getValidationNotices();
+  }
+}
diff --git a/scripts/queue_runner.sh b/scripts/queue_runner.sh
index c8a4183af0..3a2748ce4c 100644
--- a/scripts/queue_runner.sh
+++ b/scripts/queue_runner.sh
@@ -12,10 +12,10 @@ do
    ID=$(jq '.id' <<< "$item")
    URL=$(jq '.url' <<< "$item")
    path_name=${ID//\"/}
-   java -Xmx10G -Xms8G -jar gtfs-validator-snapshot/gtfs-validator*.jar --url $URL --output_base $OUTPUT_BASE/output/$path_name --validation_report_name latest.json --system_errors_report_name latest_errors.json --skip_validator_update
+   java -Xmx12G -Xms8G -jar gtfs-validator-snapshot/gtfs-validator*.jar --url $URL --output_base $OUTPUT_BASE/output/$path_name --validation_report_name latest.json --system_errors_report_name latest_errors.json --skip_validator_update
    if [ "$master" = "--include-master" ];
    then
-      java -Xmx10G -Xms8G -jar gtfs-validator-master/gtfs-validator*.jar --url $URL --output_base $OUTPUT_BASE/output/$path_name --validation_report_name reference.json --system_errors_report_name reference_errors.json --skip_validator_update
+      java -Xmx12G -Xms8G -jar gtfs-validator-master/gtfs-validator*.jar --url $URL --output_base $OUTPUT_BASE/output/$path_name --validation_report_name reference.json --system_errors_report_name reference_errors.json --skip_validator_update
    fi;
    wait
 done