In the 2009 context, you could make a donation to the proponent or opponent groups, which is where most of the activity was happening, or you could fund a registered referendum advertiser. There were no limits, but there was disclosure after the fact of anybody who provided more than $250 to an advertiser, and the advertisers had to divulge how they spent their money after the referendum was over. The deadline on that was in August, and again, that'll be part of our reporting.
On November 17th, 2009. See this statement in context.