diff --git a/policyengine/simulation.py b/policyengine/simulation.py
index ecb794fc..f307293d 100644
--- a/policyengine/simulation.py
+++ b/policyengine/simulation.py
@@ -43,7 +43,7 @@ class SimulationOptions(BaseModel):
     scope: ScopeType = Field(..., description="The scope of the simulation.")
     data: DataType = Field(None, description="The data to simulate.")
     time_period: TimePeriodType = Field(
-        2025, description="The time period to simulate.", ge=2024, le=2035
+        2025, description="The time period to simulate.", ge=2023, le=2040
     )
     reform: ReformType = Field(None, description="The reform to simulate.")
     baseline: ReformType = Field(None, description="The baseline to simulate.")
@@ -172,6 +172,14 @@ def _initialise_simulations(self):
         else:
             self.is_comparison = False
 
+    def _handle_legacy_ecps_region_specification(
+        self,
+    ):
+        options = self.options
+        if options.region is not None and "enhanced_us" in options.region:
+            options.region = None
+            options.data = "gs://policyengine-us-data/enhanced_cps_2024.h5"
+
     def _initialise_simulation(
         self,
         country: CountryType,
@@ -194,6 +202,8 @@ def _initialise_simulation(
             },
         }[country][macro]
 
+        self._handle_legacy_ecps_region_specification()
+
         if isinstance(reform, ParametricReform):
             reform = reform.model_dump()