MONEYINPOLITICS.wtf
America’s most comprehensive dictionary of campaign finance jargon
look-back period
noun1 The past time frame covered by a campaign finance regulation or report; varies by rule and jurisdiction
Do was required to disclose the reason for his disqualification (receipt of contributions in excess of $250 during 12-month look-back period)—but he failed to do so.— Voice of OC
Under the new rules, candidates can use campaign funds to pay themselves up to 50% of the annual US House salary or the equivalent of the average annual income they earned during a longer look-back period — the previous five calendar years — whichever is lower.— CNN