regionCode property

CLDR region code of the country/region that this service area business is based in.

See http://cldr.unicode.org/ and http://www.unicode.org/cldr/charts/30/supplemental/territory_information.html for details. Example: "CH" for Switzerland. This field is required for CUSTOMER_LOCATION_ONLY businesses, and is ignored otherwise. The region specified here can be different from regions for the areas that this business serves (e.g. service area businesses that provide services in regions other than the one that they are based in). If this location requires verification after creation, the address provided for verification purposes must be located within this region, and the business owner or their authorized representative must be able to receive postal mail at the provided verification address.

Immutable.