Add SNAP immigration status eligibility

changelog_entry.yaml

@@ -0,0 +1,6 @@
+- bump: minor
+  changes:
+    added:
+    - Add SNAP immigration status eligibility, reflecting changes from the One Big Beautiful Bill Act of 2025.
+    - Exclude immigration-ineligible members from SNAP unit size.
+    - Add California-specific delayed effective date (April 1, 2026) for SNAP immigration eligibility changes per ACL 25-92.

policyengine_us/parameters/gov/states/ca/cdss/snap/eligibility/eligible_immigration_statuses.yaml

@@ -0,0 +1,26 @@
+description: California limits Supplemental Nutrition Assistance Program eligibility to these immigration statuses.
+values:
+  2018-01-01:
+    - CITIZEN
+    - LEGAL_PERMANENT_RESIDENT
+    - REFUGEE
+    - ASYLEE
+    - DEPORTATION_WITHHELD
+    - CUBAN_HAITIAN_ENTRANT
+    - CONDITIONAL_ENTRANT
+    - PAROLED_ONE_YEAR
+
+  2026-04-01:
+    - CITIZEN
+    - LEGAL_PERMANENT_RESIDENT
+    - CUBAN_HAITIAN_ENTRANT
+
+metadata:
+  label: California SNAP eligible immigration statuses
+  period: year
+  unit: list
+  reference:
+    - title: California CDSS All County Letter No. 25-92 - CalFresh Implementation of H.R. 1 Noncitizen Eligibility Changes
+      href: https://www.cdss.ca.gov/Portals/9/Additional-Resources/Letters-and-Notices/ACLs/2025/25-92.pdf#page=7
+    - title: 7 USC 2015(f) - Eligibility disqualifications
+      href: https://www.law.cornell.edu/uscode/text/7/2015#f

policyengine_us/parameters/gov/usda/snap/eligibility/eligible_immigration_statuses.yaml

@@ -0,0 +1,28 @@
+description: The Department of Agriculture limits Supplemental Nutrition Assistance Program eligibility to these immigration statuses.
+values:
+  2018-01-01:
+    - CITIZEN
+    - LEGAL_PERMANENT_RESIDENT
+    - REFUGEE
+    - ASYLEE
+    - DEPORTATION_WITHHELD
+    - CUBAN_HAITIAN_ENTRANT
+    - CONDITIONAL_ENTRANT
+    - PAROLED_ONE_YEAR
+
+  2025-07-01: # Real effective date July 4th.
+    - CITIZEN
+    - LEGAL_PERMANENT_RESIDENT
+    - CUBAN_HAITIAN_ENTRANT
+    # Compacts of Free Association (COFA) citizens
+metadata:
+  label: SNAP eligible immigration statuses
+  period: year
+  unit: list
+  reference:
+    - title: 7 USC 2015(f) - Eligibility disqualifications
+      href: https://www.law.cornell.edu/uscode/text/7/2015#f
+    - title: 8 USC 1612 - Limited eligibility of qualified aliens for certain Federal programs
+      href: https://www.law.cornell.edu/uscode/text/8/1612
+    - title: USDA FNS - SNAP Implementation of OBBB - Alien SNAP Eligibility
+      href: https://www.fns.usda.gov/snap/obbb-alien-eligibility

policyengine_us/tests/policy/baseline/gov/states/ca/cdss/snap/eligibility/ca_snap_immigration_status_eligible.yaml

@@ -0,0 +1,111 @@
+- name: Case 1, CA citizen always eligible.
+  period: 2024
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: CITIZEN
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: true
+
+- name: Case 2, CA refugee eligible pre-OBBBA.
+  period: 2024
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: true
+
+- name: Case 3, CA refugee still eligible in 2025 due to delayed implementation.
+  period: 2025
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: true
+
+- name: Case 4, CA refugee ineligible after April 2026.
+  period: 2027
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: false
+
+- name: Case 5, CA asylee still eligible in 2025.
+  period: 2025
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: ASYLEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: true
+
+- name: Case 6, CA asylee ineligible after April 2026.
+  period: 2027
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: ASYLEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: false
+
+- name: Case 7, CA LPR always eligible.
+  period: 2026
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: LEGAL_PERMANENT_RESIDENT
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: true
+
+- name: Case 8, CA undocumented never eligible.
+  period: 2024
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: UNDOCUMENTED
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    ca_snap_immigration_status_eligible: false

policyengine_us/tests/policy/baseline/gov/usda/snap/eligibility/immigration/is_snap_immigration_status_eligible.yaml

@@ -0,0 +1,118 @@
+- name: Case 1, citizen always eligible.
+  period: 2024
+  input:
+    immigration_status: CITIZEN
+  output:
+    is_snap_immigration_status_eligible: true
+
+- name: Case 2, refugee eligible pre-OBBBA.
+  period: 2024
+  input:
+    immigration_status: REFUGEE
+  output:
+    is_snap_immigration_status_eligible: true
+
+- name: Case 3, undocumented never eligible.
+  period: 2024
+  input:
+    immigration_status: UNDOCUMENTED
+  output:
+    is_snap_immigration_status_eligible: false
+
+- name: Case 4, refugee ineligible post-OBBBA federal date.
+  period: 2026
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: TX
+  output:
+    is_snap_immigration_status_eligible: false
+
+- name: Case 5, asylee ineligible post-OBBBA federal date.
+  period: 2026
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: ASYLEE
+    households:
+      household1:
+        members: [person1]
+        state_code: TX
+  output:
+    is_snap_immigration_status_eligible: false
+
+- name: Case 6, citizen still eligible post-OBBBA.
+  period: 2026
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: CITIZEN
+    households:
+      household1:
+        members: [person1]
+        state_code: TX
+  output:
+    is_snap_immigration_status_eligible: true
+
+- name: Case 7, LPR still eligible post-OBBBA.
+  period: 2026
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: LEGAL_PERMANENT_RESIDENT
+    households:
+      household1:
+        members: [person1]
+        state_code: TX
+  output:
+    is_snap_immigration_status_eligible: true
+
+- name: Case 8, CA refugee still eligible in 2025 due to delayed implementation.
+  period: 2025
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    is_snap_immigration_status_eligible: true
+
+- name: Case 9, CA refugee still eligible in January 2026 due to delayed implementation.
+  period: 2026-01
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    is_snap_immigration_status_eligible: true
+
+- name: Case 10, CA refugee ineligible in 2027 after delayed implementation ends.
+  period: 2027
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: REFUGEE
+    households:
+      household1:
+        members: [person1]
+        state_code: CA
+  output:
+    is_snap_immigration_status_eligible: false

policyengine_us/tests/policy/baseline/gov/usda/snap/eligibility/is_snap_eligible.yaml

@@ -99,3 +99,21 @@
         meets_snap_categorical_eligibility: false
   output:
     is_snap_eligible: true
+
+- name: Case 8, single undocumented ineligible student.
+  period: 2024-01
+  absolute_error_margin: 0.1
+  input:
+    people:
+      person1:
+        immigration_status: UNDOCUMENTED
+        is_snap_ineligible_student: true
+    spm_units:
+      spm_unit1:
+        members: [person1]
+        meets_snap_gross_income_test: true
+        meets_snap_net_income_test: true
+        meets_snap_asset_test: true
+        meets_snap_categorical_eligibility: false
+  output:
+    is_snap_eligible: false