---
title: "Tariff Optimize - Get Tariff Applicability Questions"
method: GET
path: "/spark/optimized_tariffs/applicabilities"
tags: ["Spark"]
---

# Tariff Optimize - Get Tariff Applicability Questions

`GET /spark/optimized_tariffs/applicabilities`

Gets the list of applicability questions for all potential tariffs. Tariffs sometimes have eligibility conditions to sign up for them ("applicabilities"). For example, signing up for an EV tariff often requires an electric car registered to the account holder at the account's address. Answers to the returned applicability questions can be passed to the recommendations endpoint to get the most relevant tariffs.

The set of potential tariffs can be specified either by an Arcadia Utility Account ID, or by considering all tariffs in a given zip code served by a specific [Genability Load Serving Entity (LSE)](https://developer.genability.com/api-reference/tariff-api/load-serving-entity/).

__Either utility_account_id or both the zip_code/lse_id must be specified.__

## Query parameters

- `utility_account_id` integer
- `zip_code` string
- `lse_id` string

## Headers

- `Arcadia-Version` string, required

## Response `200`

Success

- TariffApplicabilityQuestionsResponse
  - `country` string, required — The country used for determining tariff applicability
  - `lse_id` string, required — The Genability 'lseId' unique identifier for this load serving entity. See [Genability documentation](https://developer.genability.com/api-reference/tariff-api/load-serving-entity/) for details.
  - `zip_code` string, required — The zip code used for determining tariff applicability
  - `applicability_questions` TariffApplicabilityQuestionSchema[], required — List of applicability questions that will determine optimization-eligible tariffs in this LSE.
    - `id` string, required — String identifier for the applicability question
    - `user_question` string, required — The user question corresponding to this tariff applicability
    - `user_question_details` string, nullable — The user question details corresponding to this tariff applicability
    - `answer_data_type` string, required — Type of answer expected to be returned for this tariff applicability question

## Other responses

- `422` — Bad Request

---

[API](https://skmtc.dev/arcadia/apis/arcadia-api-reference.md) · [All operations](https://skmtc.dev/arcadia/apis/arcadia-api-reference/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/arcadia/arcadia-api-reference/revisions/468f1c903722/schema)