Syntax: %bLEVEL <channel> RESET <type|index>%b

The %bLEVEL RESET%b command will set the level specified
to the default one specified by services. To obtain a
list of types/indices to use for the fourth arguement,
type: %b/msg %C LEVEL <channel> LIST%b.

Examples:
         %b/msg %C LEVEL #chan RESET autovoice%b
           Resets the level required for an autovoice
           on #chan to the default level (5)

         %b/msg %C LEVEL #chan RESET all%b
           Resets the entire access level list for
           #chan to the default list.
