What does the Federal Campaign Act of 1974 emphasize in terms of donor transparency?

The Federal Campaign Act of 1974 emphasizes donor transparency primarily through the requirement for the disclosure of who contributes to political campaigns. This legislation was introduced in the wake of the Watergate scandal and aimed to provide greater transparency in campaign financing, ensuring that voters are informed about the sources of funding behind political candidates. By mandating that campaigns publicly disclose their donors, the act helps to enhance accountability and mitigate the risks of corruption and undue influence in the political process. This transparency is vital in maintaining an informed electorate and promoting trust in the electoral system.

The other options do not align with the central focus of the act. While restrictions on political ads are part of campaign finance regulations, they do not address donor transparency directly. The act does not impose limits on the number of political parties, nor does it prohibit campaign contributions outright. Instead, it establishes a regulatory framework aimed at promoting visibility into who is financing political activities.