administrative law

Impeachment of a witness

At trial, impeachment is the process of attacking the accuracy of witnesses' testimony. For example, if a witness's testimony at trial contradicts her earlier sworn statements, one or both parties might bring up the sworn statement to impeach her...

Internal Revenue Service (IRS)

The Internal Revenue Service (IRS) is the tax administrator and collector of the United States of America. It’s a bureau of the Department of the Treasury.

In July of 1862, Congress established the Office...

Legislative Veto

In administrative law, a provision that allows a congressional resolution (passed by a majority of congress, but not signed by the President) to nullify a rulemaking or other action taken by an executive agency. At one time, legislative veto provisions...

peremptory writ of mandate (or mandamus)

Definition from Nolo’s Plain-English Law DictionaryA court order to any governmental body, government official, or a lower court requiring that the body, official, or court perform an act the court finds is an official duty required by law. Compare:...

prerogative writ

Definition from Nolo’s Plain-English Law DictionaryAn antiquated term for any writ (court order) directed to government agencies, public officials, or another court. (See also: mandamus)

Definition provided by Nolo’s Plain-English Law Dictionary.



1) A proceeding conducted by an administrative or executive official that is similar to a court proceeding, e.g. a hearing. A court may review a decision arising from a quasi-judicial proceeding.

2) A judicial act performed by an...



A legislative-like act undertaken by an entity other than a legislature. For example, rulemaking undertaken by an administrative agency is a quasi-legislative act.

Illustrative caselaw

See, e.g. Humphrey's Ex'r v. United States, 295 U.S...


Definition from Nolo’s Plain-English Law DictionaryA person whom a judge appoints to handle certain parts of a case, such as taking testimony or reviewing written evidence. Sometimes, the referee makes written findings and submits them to the judge to use...


The term "Rules" typically refers to the regulations adopted by an administrative agency in order to effectuate the purposes of statutes that are adopted by Congress or another legislative body.

For example, Congress enacted a statute...