diff --git a/sdks/go/pkg/beam/runners/prism/internal/handlerunner.go b/sdks/go/pkg/beam/runners/prism/internal/handlerunner.go
index a205c768731b..910fa0a0ca87 100644
--- a/sdks/go/pkg/beam/runners/prism/internal/handlerunner.go
+++ b/sdks/go/pkg/beam/runners/prism/internal/handlerunner.go
@@ -297,6 +297,10 @@ func gbkBytes(ws *pipepb.WindowingStrategy, wc, kc, vc *pipepb.Coder, toAggregat
 		outputTime = func(w typex.Window, et mtime.Time) mtime.Time {
 			return w.MaxTimestamp()
 		}
+	case pipepb.OutputTime_EARLIEST_IN_PANE, pipepb.OutputTime_LATEST_IN_PANE:
+		outputTime = func(w typex.Window, et mtime.Time) mtime.Time {
+			return et
+		}
 	default:
 		// TODO need to correct session logic if output time is different.
 		panic(fmt.Sprintf("unsupported OutputTime behavior: %v", ws.GetOutputTime()))
diff --git a/sdks/go/pkg/beam/runners/prism/internal/jobservices/management.go b/sdks/go/pkg/beam/runners/prism/internal/jobservices/management.go
index 737a1b22276a..3efe48e23119 100644
--- a/sdks/go/pkg/beam/runners/prism/internal/jobservices/management.go
+++ b/sdks/go/pkg/beam/runners/prism/internal/jobservices/management.go
@@ -22,6 +22,7 @@ import (
 	"sync"
 	"sync/atomic"
 
+	"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph/mtime"
 	jobpb "github.com/apache/beam/sdks/v2/go/pkg/beam/model/jobmanagement_v1"
 	pipepb "github.com/apache/beam/sdks/v2/go/pkg/beam/model/pipeline_v1"
 	"github.com/apache/beam/sdks/v2/go/pkg/beam/runners/prism/internal/urns"
@@ -195,7 +196,8 @@ func (s *Server) Prepare(ctx context.Context, req *jobpb.PrepareJobRequest) (*jo
 
 	// Inspect Windowing strategies for unsupported features.
 	for wsID, ws := range job.Pipeline.GetComponents().GetWindowingStrategies() {
-		check("WindowingStrategy.AllowedLateness", ws.GetAllowedLateness(), int64(0))
+		check("WindowingStrategy.AllowedLateness", ws.GetAllowedLateness(), int64(0), mtime.MaxTimestamp.Milliseconds())
+
 		// Both Closing behaviors are identical without additional trigger firings.
 		check("WindowingStrategy.ClosingBehaviour", ws.GetClosingBehavior(), pipepb.ClosingBehavior_EMIT_IF_NONEMPTY, pipepb.ClosingBehavior_EMIT_ALWAYS)
 		check("WindowingStrategy.AccumulationMode", ws.GetAccumulationMode(), pipepb.AccumulationMode_DISCARDING)