diff --git a/tardis/io/config_reader.py b/tardis/io/config_reader.py
index 30518e8b1be..90543314387 100644
--- a/tardis/io/config_reader.py
+++ b/tardis/io/config_reader.py
@@ -317,6 +317,7 @@ def from_config_dict(cls, config_dict, validate=True, config_dirname=""):
         if "csvy_model" in validated_config_dict.keys():
             pass
         elif "model" in validated_config_dict.keys():
+
             # Model Section Validation
             # Only Valid for Tardis Config File
             # Not Valid for CSVY File Config
@@ -344,36 +345,58 @@ def from_config_dict(cls, config_dict, validate=True, config_dirname=""):
                         f"Inner Boundary Velocity = {v_inner_boundary} \n"
                         f"Outer Boundary Velocity = {v_outer_boundary}"
                     )
-
-            if model_section["structure"]["density"]["type"] == "exponential":
-                time_0 = model_section["structure"]["density"]["time_0"]
-                rho_0 = model_section["structure"]["density"]["rho_0"]
-                v_0 = model_section["structure"]["density"]["v_0"]
-                if not time_0.value > 0:
-                    raise ValueError(f"Time Specified is Invalid, {time_0}")
-                if not rho_0.value > 0:
-                    raise ValueError(f"Density Specified is Invalid, {rho_0}")
-                if not v_0.value > 0:
-                    raise ValueError(f"Velocity Specified is Invalid, {v_0}")
-            elif model_section["structure"]["density"]["type"] == "power_law":
-                time_0 = model_section["structure"]["density"]["time_0"]
-                rho_0 = model_section["structure"]["density"]["rho_0"]
-                v_0 = model_section["structure"]["density"]["v_0"]
-                if not time_0.value > 0:
-                    raise ValueError(f"Time Specified is Invalid, {time_0}")
-                if not rho_0.value > 0:
-                    raise ValueError(f"Density Specified is Invalid, {rho_0}")
-                if not v_0.value > 0:
-                    raise ValueError(f"Velocity Specified is Invalid, {v_0}")
-            elif model_section["structure"]["density"]["type"] == "uniform":
-                time_0 = model_section["structure"]["density"]["time_0"]
-                value = model_section["structure"]["density"]["value"]
-                if not time_0.value > 0:
-                    raise ValueError(f"Time Specified is Invalid, {time_0}")
-                if not value.value > 0:
-                    raise ValueError(
-                        f"Density Value Specified is Invalid, {value}"
-                    )
+            if "density" in model_section["structure"].keys():
+                if (
+                    model_section["structure"]["density"]["type"]
+                    == "exponential"
+                ):
+                    rho_0 = model_section["structure"]["density"]["rho_0"]
+                    v_0 = model_section["structure"]["density"]["v_0"]
+                    if not rho_0.value > 0:
+                        raise ValueError(
+                            f"Density Specified is Invalid, {rho_0}"
+                        )
+                    if not v_0.value > 0:
+                        raise ValueError(
+                            f"Velocity Specified is Invalid, {v_0}"
+                        )
+                    if "time_0" in model_section["structure"]["density"].keys():
+                        time_0 = model_section["structure"]["density"]["time_0"]
+                        if not time_0.value > 0:
+                            raise ValueError(
+                                f"Time Specified is Invalid, {time_0}"
+                            )
+                elif (
+                    model_section["structure"]["density"]["type"] == "power_law"
+                ):
+                    rho_0 = model_section["structure"]["density"]["rho_0"]
+                    v_0 = model_section["structure"]["density"]["v_0"]
+                    if not rho_0.value > 0:
+                        raise ValueError(
+                            f"Density Specified is Invalid, {rho_0}"
+                        )
+                    if not v_0.value > 0:
+                        raise ValueError(
+                            f"Velocity Specified is Invalid, {v_0}"
+                        )
+                    if "time_0" in model_section["structure"]["density"].keys():
+                        time_0 = model_section["structure"]["density"]["time_0"]
+                        if not time_0.value > 0:
+                            raise ValueError(
+                                f"Time Specified is Invalid, {time_0}"
+                            )
+                elif model_section["structure"]["density"]["type"] == "uniform":
+                    value = model_section["structure"]["density"]["value"]
+                    if not value.value > 0:
+                        raise ValueError(
+                            f"Density Value Specified is Invalid, {value}"
+                        )
+                    if "time_0" in model_section["structure"]["density"].keys():
+                        time_0 = model_section["structure"]["density"]["time_0"]
+                        if not time_0.value > 0:
+                            raise ValueError(
+                                f"Time Specified is Invalid, {time_0}"
+                            )
 
             # SuperNova Section Validation
             supernova_section = validated_config_dict["supernova"]