A player is fully protected over his bases if his level is under 40% of the aggressor level, in an empty astro that protection no longer apply
If you attack a player 40% above your own level, you lost the previous protection for 72 hours
Any bases under 2 days old cannot be hit
If an account go inactive for 7 days, and ain't under vacation mode, anyone can hit his bases
Inactive players will have his bases coords revealed in the Locations tab under his profile page for his alliance leadership after 7 days, his alliance members after 14 days, and to all users after 21 days
30 days inactive and free account turn BORC