[A] The IDN has an extension which refers to the country specific domain such as .br for Brazil and .cn for China
[B] The IDN has at least a single label which is language specific such as Chinese or Hindi.
[C] The IDN Domain Registries are not accredited by ICANN ( Internet Corporation for Assigned Names and Numbers) but the independent registries in some countries.
[D] The IDN is out of the rules and procedures of the Domain Name System (DNS).