Admittedly, regulating party and campaign finances is a difficult task. There is a wide variety of regulations in operation throughout Europe and other world regions. Regulations may refer to party funding as a whole and/or to electoral campaigns. Laws may provide for public or private funding, or for both. There are systems with contribution and expenditure limits, and others without them. There may be bans on certain types of contributions, as well as on certain types of expenditure. Moreover, electoral and party laws differ considerably with regard to the disclosure of party and campaign funds as well as with regard to public access to the disclosed information.