The particularities of this entry permit are much simpler and more accessible than the Visa.
People who have a IS for enter the United States Some particularities must be taken into account. One of these points of said visa waiver program -its acronym in English is Electronic System for Travel Authorization- is the number of times allowed to enter the United States per year.
According to the official site dedicated to this procedure, those who have this permit they will be able to visit the United States an unlimited number of times during the validity of the permit, which is two years.
The retention period is 90 days each time. Although, there are certain singularities that should be taken into account.
The first clarification is that the person does not have to return to their country of origin in that period, but must have left the United States.
One possible situation: if a person who has the IS, stays for 40 days, then travels to Mexico for 30 days and returns to the United States; in this second income you can stay 20 dayssince time in Mexico is counted.
It should also be noted that you cannot leave the United States briefly and then return.
On this, the same source explains that an official from the United States Customs and Border Protection Office will make an evaluation. If you are suspected of having left the United States for the sole purpose of extending your permit period, you may not be allowed entry.
Who can request the ESTA
to order the ISthe person must have a valid passport from one of the countries that make up the visa waiver.
In the case of people who are natives of other countries and who have dual citizenship from one of those countries, they are also included.
A very frequent example is that of Latin Americans who have a Spanish, Italian or other European passport, because they are direct descendants of European immigrants.