Usage: PROP <#channel> POLICY [<CLOSED|OPEN>]
In a channel with an OPEN policy, every user can add himself to the UOP access list. In CLOSED channels (the default), this is not possible.
This behaviour is intended for channels that offer a type of mailing list, it may send channel memos with updates and information, and all UOPs will receive those memos.
Privilege: user
Attribute: read-write
/prop #Philadelphia policy
/prop #Philadelphia policy normal
/prop #Philadelphia policy open
Note: An OPEN policy does not lower security in a channel, because AKICKs placed in OPEN channels can not be overridden by self-invitation from self-added UOPs.