The Full Form of SLL is Special and Local Laws.

Special legislation is a legal term of art used in the United States to refer to legislation that targets an individual or a small, identifiable group for treatment that does not apply to all the members of a given class. A statute is often called special legislation when it targets a named person, but the term can also be applied to legislation that singles out an association or corporation. Although a prototypical special law applies only to a single particular person or entity, legislation is often considered special when it applies to a small group of people or other entities.

Special legislation can be used to place burdens on or grant benefits to identifiable individuals. During the confederation period, Bills of Attainder, the most well-known type of special legislation, were enacted by state legislatures to punish individuals suspected, but neither charged nor convicted, of a crime. Special legislation was also used during this period to grant benefits to identifiable individuals, including monopoly rights and exemptions them from generally applicable laws