There is a loophole in AC21: if you have an approved I-140 then you can extend H-1B indefinitely in 3 year increments. The trick is that I-140, once approved fo

There is a loophole in AC21: if you have an approved I-140 then you can extend H-1B indefinitely in 3 year increments. The trick is that I-140, once approved for 6 months, cannot become unapproved via a USCIS memo. So there are now hundreds of thousdand H-1Bs with permanent I-140s getting infintie H-1B terms.