“免签证计划”使一些国家的公民能到美国进行为期90天以内的旅游观光或商务往来而无需申请签证。从2003年10月1日开始,每一位使用“免签证计划”的游客必须在美国入境处出示一份电脑可读护照(MRP)才能无签证进入美国。那些没有电脑可读护照的人必须持有非移民签证。这一变更应用于所有类型的护 Visa Waiver Program allows citizens of some countries to travel to the United States for travel, sightseeing or business within 90 days without applying for a visa. Beginning on October 1, 2003, every visitor using the Visa Waiver Program must present a computer-readable passport (MRP) at the US entry point to enter the United States without a visa. Those who do not have a computer-readable passport must hold a non-immigrant visa. This change applies to all types of protection