Several versions of UPA have been promulgated by the NCCUSL, the earliest having been put forth in 1914, and the most recent in 1997.
RUPA is significantly more detailed than is the UPA as to the degree to which the partnership agreement may modify the default rules set forth in the statute.
RUPA also clarifies the nature of a partnership itself by clearly defining it as an entity rather than an aggregation of individuals.
The NCCUSL website lists the states that it considers to have adopted these and other uniform acts.
The NCCUSL website lists these states and territories as having adopted UPA (1997): Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Hawaii, Idaho, Illinois, Iowa, Kansas, Kentucky, Maine, Maryland, Minnesota, Mississippi, Montana, Nebraska, Nevada, New Jersey, New Mexico, North Dakota, Ohio, Oklahoma, Oregon, South Dakota (substantially similar), Tennessee, Texas (substantially similar), U.S. Virgin Islands, Utah, Vermont, Virginia, Washington, West Virginia, and Wyoming.