The information I saw says that it is required for "all licensed mariners". So if you have your OUPV license you would be required to get it.

No it doesn't make any sense - actually if you think about it this is going to make the TWIC less effective. By forcing guys who have no reason to access "secured ports" to get TWIC cards they are increasing the odds that someone with bad intentions will get a TWIC and have access to the secured ports. But what do I know.

I also read that if you don't get your TWIC card they MAY revoke your license. My guess is that if you never access a secured port - they will probably not come looking for you. But that they would probably get you when you went in for your next renewal.

My appointment to get mine is on Tuesday...