Page routing can also depend on subsection

app/models/form/page.rb

@@ -22,9 +22,17 @@ class Form::Page
   end
 
   def routed_to?(case_log)
+    return true unless depends_on || subsection.depends_on
+
+    subsection.enabled?(case_log) && depends_on_met(case_log)
+  end
+
+private
+
+  def depends_on_met(case_log)
     return true unless depends_on
 
-    subsection.enabled?(case_log) && depends_on.all? do |question, value|
+    depends_on.all? do |question, value|
       !case_log[question].nil? && case_log[question] == value
     end
   end

app/models/form/question.rb

@@ -80,7 +80,7 @@ class Form::Question
     # Special case as No is a valid answer but doesn't let you progress and use the service
     return false if id == "gdpr_acceptance" && case_log[id] == "No"
 
-    case_log[id].present?
+    case_log[id].present? || !case_log.respond_to?(id.to_sym)
   end
 
 private

spec/models/form/page_spec.rb

@@ -63,5 +63,17 @@ RSpec.describe Form::Page, type: :model do
         expect(subject.routed_to?(case_log)).to be true
       end
     end
+
+    context "when the page's subsection has routing conditions" do
+      let(:section_id) { "submission" }
+      let(:subsection_id) { "declaration" }
+      let(:page_id) { "declaration" }
+      let(:completed_case_log) { FactoryBot.build(:case_log, :completed, incfreq: "Weekly") }
+
+      it "evaluates the sections dependencies" do
+        expect(subject.routed_to?(case_log)).to be false
+        expect(subject.routed_to?(completed_case_log)).to be true
+      end
+    end
   end
 end