While it is advisable to plan ahead and apply well in time, do keep in mind that the earliest that you can apply is 90 days or 3 months prior to the expected day of your departure.
It is recommended that the request be sent as soon as possible and at least 16 calendar days prior to the scheduled visit. Please notice that applications must be submitted at least six months prior to the proposed tour’s start date.
Before their current visa expires, the holder of a valid visa may apply for a new one.