Pay no Pension Credit child amount to a family with a tax credit award

changelog.d/pc-child-amount-tax-credit-award.fixed.md

@@ -0,0 +1,2 @@
+- Pay no Pension Credit child amount (SPC Regs 2002 Schedule IIA) to a family awarded child tax credit or working tax credit, including an award at a nil rate (reg 6(6)(d) and (11); TCA 2002 s.14(3)). The new variable `has_tax_credit_award` records the award.
+- Pay no Schedule IIA amount before it began on 1 February 2019 (SI 2018/676 reg 2). The new parameter `gov.dwp.pension_credit.guarantee_credit.child.in_effect` dates it.

policyengine_uk/parameters/gov/dwp/pension_credit/guarantee_credit/child/in_effect.yaml

@@ -0,0 +1,15 @@
+description: Whether the Pension Credit minimum guarantee includes the Schedule IIA additional amount for a child or qualifying young person.
+values:
+  2003-10-06: false
+  # SI 2018/676 reg 2(2)(c) and (4) added reg 6(6)(d) and Schedule IIA from
+  # 1 February 2019. Before then, support for a pensioner's child came through
+  # Child Tax Credit.
+  2019-02-01: true
+metadata:
+  unit: bool
+  label: Pension Credit child amount in effect
+  reference:
+    - title: The State Pension Credit Regulations 2002 reg. 6(6)(d)
+      href: https://www.legislation.gov.uk/uksi/2002/1792/regulation/6
+    - title: The State Pension Credit (Additional Amount for Child or Qualifying Young Person) (Amendment) Regulations 2018 reg. 2
+      href: https://www.legislation.gov.uk/uksi/2018/676/regulation/2