What are FARs & where can I find them? What is FAR 23, 25, 135, etc? The FARs (or Federal Aviation Regulations) are the regulations imposed by the FAA on aviation within the United States.

Many questions make reference to FAR 23, or FAR 91 etc. What are each of these? Where can one lookup the text?
In the US the "Federal Aviation Regulations" (FARs) is shorthand for referring to Title 14 of the Code of Federal Regulations.

You can browse all sections of FARs at ECFR.Gov.

FAR 23, for example, covers airworthiness standards. § 23.25 regulates weight limits.