The SHINE Act would require political committees to publicly disclose large donations received in the final weeks before an election. Specifically, committees would need to file special reports within 48 hours of receiving any contribution of $1,000 or more that arrives between 20 days and 2 days before an election in which the committee makes campaign contributions or expenditures. The bill applies to most political committees except those directly affiliated with political parties. The Federal Election Commission must write regulations to implement the requirement within 90 days of the law's enactment, and the rules would take effect immediately after that period for any elections held afterward. The legislation aims to increase transparency around late-stage campaign funding and reduce what sponsors call "hidden interests" in elections.