This guide provides several handy links for several resources having to do with laws, regulations and guidance, including the following:
Regulations.gov bills itself as "Your Voice in Federal Decisions-Making". The site allows for public commentary on Proposed Rules, and allows for searches of commentary for Rules, Notices, and Supporting & Related Material. This site is also useful for finding information regarding Significant Guidance Documents
The Office of Management and Budget (OMB) issued a Final Bulletin for Agency Good Guidance Practices on January 18, 2007. It was announced in the Federal Register on January 25, 2007 (72 FR 3432). According to the Federal Register entry, the Bulletin "establishes policies and procedures for the development, issuance, and use of significant guidance documents by Executive Branch departments and agencies. (The) Bulletin is intended to increase the quality and transparency of agency guidance practices and the significant guidance documents produced through them."
The Bulletin establishes and defines three categories of guidance documents:
An Internet search for any of the above categories along with a specific Executive branch agency is generally successful in returning relevant results.
For a more thorough understanding of guidance documents, you may wish to consult the Federal Register entry, 72 FR 3432, which published the Final Bulletin, and Executive Order 13422, "Further Amendment to Executive Order 12866 on Regulatory Planning and Review" which amended Executive Order 12866, "Regulatory Planning and Review.", both of which are referenced in 72 FR 3432.