Campaign Finance Reform in Maine

Here is a website that does a good job of summarizing what Maine passed, I have included some key provisions:

"The law was passed by Maine voters in a referendum in 1996 and came into effect in 2000. Candidates who demonstrate citizen support by collecting a set number of $5 qualifying contributions from voters within their districts (50 contributions for a State House race, 150 for the state Senate, and 2,500 for a gubernatorial race) are eligible for fixed and equal campaign funding from the Clean Election Fund. To receive their money, candidates must agree to forgo all private contributions (including self-financing), and limit their spending to the amount from the fund.

Participating Clean Money candidates are also given an additional one-for-one match if they are outspent by non-complying opponents or are the target of independent expenditures (such as ads produced by a group not associated with the opposing candidate). Candidates who reject the option of Clean Money or who fail to qualify are still free to collect private money under the existing system."