Multiple entry visa

[kumar74]

Hi,

My father got a multiple entry B-1 visa for 10 years. Is there any rule that state he need to make his first visit in so many months (3 or 6) to keep the visa valid. He was initially planning to join us here this month, but cannot travel due to some personal issues. Will his visa expiry automatically in this case ?

Pradeep

[immihelp]

There is no such rule. He can come whenever he wants, before visa expires.