Returns required fields JSON Schema for a given region. These are required in order to calculate
the cost of employment for the region. These fields are based on employer contributions that are associated
with the region or any of it's parent regions.

Authentication

This endpoint accepts any one of the following token types:

• Company-scoped access token (OAuth2AuthorizationCode) — obtained through the Authorization Code flow or the Refresh Token flow. See Authentication for partners.
• Client credentials access token (OAuth2ClientCredentials) — obtained through the Client Credentials flow or the Refresh Token flow. See Authentication for partners.
• Customer API token (CustomerAPIToken) — generated by the customer on their Integration Settings page. See Authorization for customers.
• Client token (ClientToken) — a partner client_token, accepted only on marketing endpoints. See Authentication for partners.