CLDc-4174: update subsection

app/models/form/sales/subsections/shared_ownership_staircasing_transaction.rb

@@ -25,7 +25,7 @@ class Form::Sales::Subsections::SharedOwnershipStaircasingTransaction < ::Form::
       Form::Sales::Pages::Mortgageused.new("staircase_mortgage_used_shared_ownership", nil, self, ownershipsch: 1),
       Form::Sales::Pages::MonthlyRentStaircasingOwned.new(nil, nil, self),
       Form::Sales::Pages::MonthlyRentStaircasing.new(nil, nil, self),
-      Form::Sales::Pages::ServiceChargeStaircasing.new("service_charge_staircasing", nil, self),
+      (Form::Sales::Pages::ServiceChargeStaircasing.new("service_charge_staircasing", nil, self) if form.start_year_2026_or_later?),
       Form::Sales::Pages::MonthlyChargesValueCheck.new("monthly_charges_shared_ownership_value_check", nil, self),
     ].compact
   end