diff --git a/spec.bs b/spec.bs
index 58b582b..fe4d0aa 100644
--- a/spec.bs
+++ b/spec.bs
@@ -575,11 +575,24 @@ Moreover, each {{SharedStorageWorklet}}'s [=global scopes|list of global scopes=
         1. If |filteringIdMaxBytes| is not the [=default filtering ID max bytes=] or
             |contextId| is not null, return a new {{DOMException}} with name
             "`DataError`".
+    1. Let |maxContributions| be null.
+    1. If
+        |privateAggregationConfig|["{{SharedStoragePrivateAggregationConfig/maxContributions}}"]
+        [=map/exists=], set |maxContributions| to
+        |privateAggregationConfig|["{{SharedStoragePrivateAggregationConfig/maxContributions}}"].
+    1. If |maxContributions| is not a positive integer, set |maxContributions| to null.
     1. Return a new [=pre-specified report parameters=] with the items:
         : <a spec="private-aggregation-api" for="pre-specified report parameters">context ID</a>
         :: |contextId|
         : [=pre-specified report parameters/filtering ID max bytes=]
         :: |filteringIdMaxBytes|
+        : <var ignore>requested max contributions</var>
+        :: |maxContributions|
+
+        Issue: Remove the `ignore` tag on <var ignore>requested max
+               contributions</var> once Private Aggregation's [PR
+               #164](https://github.com/patcg-individual-drafts/private-aggregation-api/pull/164)
+               is merged.
   </div>
 
   <div algorithm>
@@ -1446,6 +1459,7 @@ On the other hand, methods for getting data from the [=shared storage database=]
     USVString aggregationCoordinatorOrigin;
     USVString contextId;
     [EnforceRange] unsigned long long filteringIdMaxBytes;
+    [EnforceRange] unsigned long long maxContributions;
   };
 
   dictionary SharedStorageRunOperationMethodOptions {