diff --git a/internal/broker/condition_grant_test.go b/internal/broker/condition_grant_test.go
new file mode 100644
index 00000000..2fcc02a4
--- /dev/null
+++ b/internal/broker/condition_grant_test.go
@@ -0,0 +1,74 @@
+package broker
+
+import "testing"
+
+// The operator-channel seat as the messenger declares it once it takes a module's condition: copied from
+// mesh-catalog modules/messenger/module.json at 5b235a6e (issue 1217), the seat's accepts, emits and by-caller verbs.
+func operatorChannelWithCondition() Seat {
+	return Seat{Name: "operator-channel", Scope: "mesh", Accepts: []string{"ask", "cancel", "condition"},
+		Emits: []string{"decided"}, Serves: []string{"open", "history", "notify", "tell", "asks"},
+		ByCaller: []string{"ask", "cancel", "condition", "decided"}, Records: []string{"asks"}}
+}
+
+// 1216/AC1: a module that uses the seat may publish its condition under its own name.
+func TestAModuleUsingTheOperatorChannelMayPublishItsConditionUnderItsOwnName(t *testing.T) {
+	x := perms(t, Principal{Kind: KindModule, Node: "anchor", Module: "web-app", Uses: []Seat{operatorChannelWithCondition()}})
+	if !allowed(x.Publish, "mesh.seat.operator-channel.accept.condition.web-app") {
+		t.Errorf("web-app may not say a condition as itself: %v", x.Publish)
+	}
+}
+
+// 1216/AC2: it may not publish a condition under another module's name, nor on the wildcard.
+func TestAModuleMayNotSayAConditionUnderAnotherName(t *testing.T) {
+	x := perms(t, Principal{Kind: KindModule, Node: "anchor", Module: "web-app", Uses: []Seat{operatorChannelWithCondition()}})
+	for _, subject := range []string{
+		"mesh.seat.operator-channel.accept.condition.other-app",
+		"mesh.seat.operator-channel.accept.condition.*",
+		"mesh.seat.operator-channel.accept.condition.>",
+		"mesh.seat.operator-channel.accept.condition",
+	} {
+		if allowed(x.Publish, subject) {
+			t.Errorf("web-app may publish %s", subject)
+		}
+	}
+}
+
+// 1216/AC3: the seat's holder may take accept.condition.<any module> from the work queue SEAT_OPERATOR_CHANNEL.
+func TestTheHolderOfTheOperatorChannelTakesEveryModulesCondition(t *testing.T) {
+	seat := operatorChannelWithCondition()
+	holder := perms(t, Principal{Kind: KindModule, Node: "anchor", Module: "messenger", Holds: []Seat{seat}})
+	if !allowed(holder.Subscribe, "mesh.seat.operator-channel.accept.condition.web-app") ||
+		!allowed(holder.Subscribe, "mesh.seat.operator-channel.accept.condition.other-app") {
+		t.Errorf("the holder does not take accept.condition.*: %v", holder.Subscribe)
+	}
+	if !allowed(holder.Publish, "$JS.API.CONSUMER.MSG.NEXT.SEAT_OPERATOR_CHANNEL.SEAT_OPERATOR_CHANNEL_worker") {
+		t.Errorf("the holder may not pull the seat's work queue: %v", holder.Publish)
+	}
+	users, _ := Users(Records{Nodes: []string{"anchor"}, Assigned: map[string][]Declared{"anchor": {
+		{Module: "messenger", Holds: []Seat{seat}},
+		{Module: "web-app", Uses: []Seat{seat}},
+	}}})
+	streams, workers := SeatTrafficObjects(users)
+	kept := false
+	for _, s := range streams {
+		if s.Name == "SEAT_OPERATOR_CHANNEL" {
+			for _, subject := range s.Subjects {
+				kept = kept || subjectMatches(subject, "mesh.seat.operator-channel.accept.condition.web-app")
+			}
+		}
+	}
+	if !kept {
+		t.Error("the work queue SEAT_OPERATOR_CHANNEL does not keep accept.condition.<module>")
+	}
+	taken := false
+	for _, w := range workers {
+		if w.Name == "SEAT_OPERATOR_CHANNEL_worker" {
+			for _, f := range w.Filters {
+				taken = taken || subjectMatches(f, "mesh.seat.operator-channel.accept.condition.web-app")
+			}
+		}
+	}
+	if !taken {
+		t.Error("the seat's worker does not take accept.condition.<module>")
+	}
+}