| Law | Probe |
|---|
| STATE | CONSTITUTION | STATUTES | CASE LAW (Since) | ADMINISTRATIVE REGS |
AGENCY DIRECTORY |
| Alabama | Yes | Yes | 1955 | No | Yes |
| Alaska | Yes | Yes | 1960 | Yes | Yes |
| Arizona | Yes | Yes | 1930 | Yes | Yes |
| Arkansas | Yes | Yes | 1957 | No | Yes |
| California | Yes | Yes | 1930 | Yes | Yes |
| Colorado | Yes | Yes | 1930 | No | Yes |
| Connecticut | Yes | Yes | 1950 | No | Yes |
| Delaware | No | Yes | 1950 | Recent | Yes |
| Florida | Yes | Yes | 1950 | Yes | Yes |
| Georgia | Yes | Yes | 1940 | Yes | Yes |
| Hawaii | Yes | Yes | 1930 | Yes | Yes |
| Idaho | Yes | Yes | 1965 | Yes | Yes |
| Illinois | Yes | Yes | 1985 | Yes | Yes |
| Indiana | Yes | Yes | 1940 | Yes | Yes |
| Iowa | Yes | Yes | 1995 | Yes | Yes |
| Kansas | Yes | Yes | 1982 | Yes | Yes |
| Kentucky | Yes | Yes | 1945 | Yes | Yes |
| Louisiana | Yes | Yes | 1980 | Yes | Yes |
| Maine | Yes | Yes | 1996 | Yes | Yes |
| Maryland | Yes | Yes | 1950 | No | Yes |
| Massachussets | Yes | Yes | 1930 | Yes | Yes |
| STATE | CONSTITUTION | STATUTES | CASE LAW (Since) | ADMINISTRATIVE REGS |
AGENCY DIRECTORY |
| Michigan | Yes | Yes | 1930 | Yes | Yes |
| Minnesota | Yes | Yes | 1930 | Yes | Yes |
| Mississippi | Yes | Yes(S) | 1994 | Yes | Yes |
| Missouri | Yes | Yes | 1960 | No | Yes |
| Montana | Yes | Yes | 1993 | No | Yes |
| Nebraska | Yes | Yes | 1965 | No | Yes |
| Nevada | Yes | Yes | 1996 | Yes | Yes |
| New Hampshire | Yes | Yes | 1930 | Yes | Yes |
| New Jersey | Yes | Yes | 1930 | No | Yes |
| New Mexico | Yes | Yes | 1930 | yes | Yes |
| New York | Yes | Yes | 1955 | No | Yes |
| North Carolina | Yes | Yes | 1945 | Yes | Yes |
| North Dakota | Yes | Yes | 1930 | No | Yes |
| Ohio | Yes | Yes | 1992 | Yes | Yes |
| Oklahoma | Yes | Yes | 1994 | Yes | Yes |
| Oregon | Yes | Yes | 1950 | Yes | Yes |
| Pennsylvania | Yes | Partial | 1950 | No | No |
| Rhode Island | Yes | Yes | 1950 | No | No |
| South Carolina | Yes | Yes | 1996 | Yes | Yes |
| South Dakota | Yes | Yes | 1965 | Yes | Yes |
| STATE | CONSTITUTION | STATUTES | CASE LAW (Since) | ADMINISTRATIVE REGS |
AGENCY DIRECTORY |
| Tennessee | Yes | Yes | 1950 | No | Yes |
| Texas | Yes | Yes | 1950 | Yes | Yes |
| Utah | Yes | Yes | 1950 | Yes | Yes |
| Vermont | Yes | Yes | 1930 | No | Yes |
| Virginia | Yes | Yes | 1930 | Yes | Yes |
| Washington | Yes | Yes | 1935 | Yes | Yes |
| West Virginia | Yes | No | 1991 | No | Yes |
| Wisconsin | Yes | Yes | 1945 | Yes | Yes |
| Wyoming | Yes | Yes | 1993 | Yes | Yes |