Definition
A special law is a legislative enactment that applies to a specific person, place, subject, or limited class of persons or things, rather than to the public or a defined category generally. It stands in contrast to a general law, which operates uniformly across an entire jurisdiction and upon all persons or entities within its scope.
The term carries two distinct but related meanings in legal usage:
1. A law directed at a named individual, a specific locality, or a narrow and arbitrarily defined group — for example, a statute incorporating a named city, granting a specific railroad an easement, or conferring a particular privilege on a named person. This is the form most commonly restricted or prohibited by state constitutional provisions.
2. A law that, while framed in general terms and applying to a class, operates on that class because the class is defined by characteristics sufficiently marked and important to justify legislative distinction — making the law "special" in the sense that it does not reach the general public, but is not arbitrary or unconstitutional on that account.
The two meanings point in different directions: the first signals legislative abuse warranting judicial scrutiny; the second may be perfectly valid legislation.
Common Confusion
Special law is frequently confused with private law, local law, and general law in ways that cause research errors.
A private law applies to a named individual or private entity. A local law applies to a specific geographic unit — a county, city, or district. A special law is the broader category: it may be private, local, or neither, but its defining feature is restriction to a non-universal scope. In historical sources, "special act," "private act," and "local act" are sometimes used interchangeably with "special law," which can be misleading. A general law can also be "special" in the second sense above — it applies to a defined class — without being constitutionally suspect.
Do not assume that every use of "special law" in a historical source signals an invalid or unconstitutional enactment. Context determines which meaning is in play.
Recognized Forms
/SUBTYPES
Special laws appear in several recognized forms:
— Private acts: directed at named individuals, granting specific rights, titles, divorces, name changes, or immunities.
— Local acts: directed at a specific political subdivision, such as a city charter amendment or county road authorization.
— Special class legislation: laws operating on a defined group distinguished from the general public by characteristics the legislature deemed sufficient — such as common carriers, insurance companies, or licensed professions.
— Curative or remedial special acts: enacted to validate a prior defective act, deed, or proceeding affecting specific parties.
Why It Matters in Research
The central research challenge with "special law" is navigating the constitutional restrictions that most U.S. states imposed on special legislation beginning in the late nineteenth century. Following abuses in which state legislatures enacted thousands of special acts favoring particular interests, states rewrote their constitutions to prohibit or limit special laws in enumerated subject areas — roads, courts, taxation, corporate charters, municipal powers, and many others. These provisions forced legislatures toward general laws and created an enormous body of litigation over whether a given statute crossed the line.
When researching pre-1900 state statutes, expect to encounter volumes of special and local acts published separately from the general laws. These are sometimes omitted from modern codifications and from digitized statutory compilations. A researcher looking for the governing law for a specific locality in this period may need to search session law volumes directly.
In constitutional challenges, courts developed tests for distinguishing valid class legislation from unconstitutional special laws — particularly whether the class was open (capable of including future members) or closed (fixed at the time of enactment). A closed class that cannot grow is a strong indicator of unconstitutional special legislation in most state frameworks. This distinction is crucial when reading nineteenth and early twentieth century state court decisions on statutory validity.
Federal law uses the term less as a constitutional category and more descriptively — federal private bills and special acts remain permissible and are processed through distinct congressional procedures. Researchers in federal legislative history should not import state constitutional restrictions when analyzing federal special acts.
Historical Dictionary Support
Black's Law Dictionary captures both dimensions of the term. The first definition — that a special law is one that courts at common law would not notice unless pleaded and proved like any other fact — reflects the procedural reality that courts took judicial notice of general laws but required proof of special or local acts, which were not presumed known. This distinction shaped pleading practice and evidentiary requirements in ways that persist into some modern procedural rules.
The second definition offered by Black's — a law framed in general terms, restricted to no locality, operating equally on a group distinguished by sufficiently marked characteristics — describes valid class legislation. This formulation reflects the courts' attempt to salvage laws that, while not universal, rested on rational legislative classification. The phrase "sufficiently marked and important to make them a class" tracks the equal protection analysis that courts were developing in the same period.
What historical dictionaries underemphasize is the political history driving the constitutional prohibitions on special laws. The sheer volume of special legislation in nineteenth-century state sessions — granting monopolies, incorporating friends, adjusting individual tax obligations — is not captured in definitional entries but is essential context for understanding why the term carries constitutional weight.
Jurisdictional Note
State constitutional restrictions on special laws vary significantly. Some states prohibit special laws in explicitly enumerated subject areas; others impose a broader prohibition with judicial review of the open/closed class distinction. A handful of states retain more permissive frameworks. Federal constitutional law imposes no equivalent categorical prohibition, though equal protection doctrine performs an analogous function.