MAXLIST
Indicates how many “variable” modes of "type A" that have been defined in the "CHANMODES" token a client may set in total on a channel. The value MUST be specified and is a set of "mode:number" pairs, where "mode" is a number of "type A" modes that have been defined in "CHANMODES" and "number" is how many of this mode may be set.
Also see: CHANMODES
Format: MAXLIST=<mode:number[,mode:number[,...]]>
Examples:
MAXLIST=beI:25
MAXLIST=b:25,eI:50