Question regarding Free Company membership

[JillyBean]

Disclaimer: I've only ever played XI and XIV! So "guilds" to me have only been linkshells, and you've always been able to be a member of many.

People have referred to Free Companies as "real guilds"; and we will still have Linkshells.

We know a few things:

*FC's will have their own chatlog
We'll have emblems we can put on certain armor
You need 4 people to start one (*and those 4 people have to be from the same Grand Company because the FC is formed at their GC desk?)
You can have FC housing (but you don't have to)

...and possibly the most important detail: you can only join ONE Free* Company.

What if you want to change Free* Companies? There are many reasons this could come up. Maybe it's a dumb question with an obvious answer to some of you, but I don't think I've seen it mentioned.

My question: Will we be able to resign/quit/leave a FC* and join ANOTHER one (right away?)