How long do we have before I need to excercise my L1?

[smckeown]

The L1 was issued last August, however due to a few reasons out of our control, we have not yet moved to the US. I have also not entered the US since August.

Can you tell me urgently, whether there is a period of time I must exercise my L1 visa? Am I ok to enter the US using my L1 with my family sometime in April-June?

thx

Spencer