| State | Registration |
|---|---|
| Alabama | Required |
| Alaska | Required |
| Arizona | Not required |
| Arkansas | Required |
| California | Required |
| Colorado | Required |
| Connecticut | Required |
| Delaware | Not required |
| District of Columbia | Required |
| Florida | Required |
| Georgia | Required |
| Hawaii | Required |
| Idaho | Not required |
| Illinois | Required |
| Indiana | Not required |
| Iowa | Not required |
| Kansas | Required |
| Kentucky | Required |
| Louisiana | varies |
| Maine | varies |
| Maryland | Required |
| Massachusetts | Required |
| Michigan | Required |
| Minnesota | Required |
| Mississippi | Required |
| Missouri | varies |
| Montana | Not required |
| Nebraska | Not required |
| Nevada | Required |
| New Hampshire | Required |
| New Jersey | Required |
| New Mexico | Required |
| New York | Required |
| North Carolina | Required |
| North Dakota | Required |
| Ohio | Required |
| Oklahoma | Required |
| Oregon | Required |
| Pennsylvania | Required |
| Puerto Rico | varies |
| Rhode Island | Required |
| South Carolina | Required |
| South Dakota | Not required |
| Tennessee | Required |
| Texas | varies |
| Utah | Not required |
| Vermont | Not required |
| Virginia | Required |
| Washington | Required |
| West Virginia | Required |
| Wisconsin | Required |
| Wyoming | Not required |