I would not bother to much about the driving licence if you have a licence which alows you to drive your 3 Wheeler in you own country, it will be mandatory in all other countrys.
You have a permit so your legal! The only big matter is, if you will need a Helmet, Safty Jacket, First aid kit or other required acessories prescripted by the law in which country you will drive in or through...at least for the EU...is there a difference for the US?
