Where must the publication of a new rule or regulation be filed?

The publication of a new rule or regulation is required to be filed in the Federal Register. This is a crucial step in the rule-making process as it ensures that the public is informed about new regulations, proposed rules, and notices of agency meetings. The Federal Register serves as the official journal of the federal government, containing government agency rules, proposed rules, and public notices, thereby facilitating transparency and public participation in the administrative process.

Filing in the Federal Register also fulfills legal requirements under the Administrative Procedure Act (APA), which mandates that all final rules and regulations be published to provide notice to the public and an opportunity for public comment, where applicable. This publication process is essential for the validity and enforcement of the regulations.

In contrast, other options do not fulfill the legal requirements set forth for federal rule-making. The Congressional Record is primarily a record of proceedings and debates in Congress, and while it may include some administrative actions, it is not the designated publication for federal regulations. Publishing on an agency's official website or in a national newspaper may increase accessibility or visibility, but these avenues do not replace the requirement to publish in the Federal Register, which is mandated by federal law.