We plan to come next Feb for a little over a month. i know we can get an extension on the 30 day rule by going to the immigration office, my question is, do I need to book tickets for the original 30 days and then change in order to be admitted to the country? I know you have to have a purchase made when entering stating when exiting. Anyone with experience on this. Traveling w/ toddlers, so don't really want to leave this to chance and get held up!!!