diff --git a/src/schema/rules/checks/func.yaml b/src/schema/rules/checks/func.yaml
index cce740a1ec..a908bfa345 100644
--- a/src/schema/rules/checks/func.yaml
+++ b/src/schema/rules/checks/func.yaml
@@ -127,3 +127,14 @@ SliceTimingAcquisitionDurationMutex:
   checks:
     - type(sidecar.AcquisitionDuration) == "null"
     - type(sidecar.DelayTime) == "null"
+
+VolumeTimingMissingAcquisitionDuration:
+  issue:
+    code: VOLUME_TIMING_MISSING_ACQUISITION_DURATION
+    message: |
+      The field 'VolumeTiming' requires 'AcquisitionDuration' or 'SliceTiming' to be defined.
+    level: error
+  selectors:
+    - type(sidecar.VolumeTiming) != "null"
+  checks:
+    - '"SliceTiming" in sidecar || "AcquisitionDuration" in sidecar'
diff --git a/src/schema/rules/sidecars/func.yaml b/src/schema/rules/sidecars/func.yaml
index dbb4d714e0..7192886407 100644
--- a/src/schema/rules/sidecars/func.yaml
+++ b/src/schema/rules/sidecars/func.yaml
@@ -57,10 +57,6 @@ MRIFuncTimingParameters:
         required for sequences that are described with the `VolumeTiming`
         field and that do not have the `SliceTiming` field set to allow for
         accurate calculation of "acquisition time"
-      issue:
-        code: VOLUME_TIMING_MISSING_ACQUISITION_DURATION
-        message: |
-          The field 'VolumeTiming' requires 'AcquisitionDuration' or 'SliceTiming' to be defined.
     DelayAfterTrigger: recommended
 
 # fMRI task information