48hrs is valid. 72hrs = new grab and you will be retaled in 48hrs.
I will be drafting a 24hr retal policy that I will present to the Council of FBI's Wrath for consideration. Hopefully everyone likes it becuase I would love to run a commie indy and profit from my land grabs :)
Every alliance has a Havoclause, if any member hits a country with Havoc in it's name. Then that country with the name Havoc in it's name has a 6 hour retal window.