This notice is readable by the public but the fora are not, they require passwords, a new one sent to members each week just before the end of the week. The password applies only to that forum post for that week [dates are in the heading].
Once you’ve used the password once, you need not again for that week. Also, if you comment in that forum and click follow, the rest can be done from members’ emails … for that week.
At that stage – the end of the week – a new forum post is put up. There’s a one day delay between a new forum going up and the old one closing down.
It’s not been used overly much by members to date but it’s there should they want.