（3）通常，General Visitor Visa可以签发最长3年，对于中国公民可以签发最长5年（对于美国公民可以签发最多4年），但是法规的用语是：
Multiple journey visas may be current for travel for up to 3 years from the date they are granted so long as the passport remains valid, except in the case of:
- nationals of the United States of America, in which case the visa may be current for travel for up to 4 years from the date it is granted; or
- nationals of the People’s Republic of China, in which case the visa may be current for travel for up to 5 years from the date it is granted.
这里用词都是“up to”，那么就算给一个月，移民官的做法也是合规的，没有硬伤。在法规允许的范围内，行使自由裁量权无可挑剔。
