The FMLA is found in Title 29, Chapter 28 of the US Code.

• § 2601. Findings and purposes
• Subchapter I—General Requirements for Leave (§§ 2611–2619)
• Subchapter II—Commission on Leave (§§ 2631–2636)
• Subchapter III—Miscellaneous Provisions (§§ 2651–2654)

The links above will take you to the unannotated code.

Annotations -- related cases, regulations, history -- are remarkably helpful in statutory research because they link you to material that further explains and applies the statute. For an annotated code, use the:

• United States Code Service on Lexis Advance
• United States Code Annotated on WestlawNext.

Regulations implementing the FMLA are promulgated by the Department of Labor's Wage and Hour Division. Its website has an overview of the statute along with many fact sheets, forms, posters, opinions letters, compliance assistance, etc. 

The current regulations are found in title 29 of the Code of Federal Regulations:

29 CFR Part 825

• Subpart A -- Coverage (825.100 – 825.127)
• Subpart B -- Leave Entitlements (825.200 – 825.220)
• Subpart C -- Employee and Employer Rights and Obligations (825.300 – 825.313)
• Subpart D -- Enforcement Mechanisms (825.400 – 825.404)
• Subpart E -- Recordkeeping Requirements (825.500)
• Subpart F -- Special Rules for Schools (825.600 – 825.604)
• Subpart G  -- Effect of other laws, employer practices, and collective bargaining agreements (825.700 – 825.702)
• Subpart H -- Definitions (825.800)