Missouri offered the first state-wide self-exclusion system in the US, and the only bans available have been permanent, for life. Some of the more than 16,000 people who have signed up for the lifetime bans apparently would like to have their bans lifted, and have let the gambling commission know of their preference. Missouri has complied, converting the lifetime bans into five-year bans. I am all for offering a new set of bans of varying lengths, but the retroactive changes I am less sure about. Further, it looks as if all future bans will be for five years -- though if a person signs up for a second ban, then it would be of lifetime duration. (Unless Missouri does some more retroactive tinkering...)
I learned about the changes here. The article doesn't state what steps an excluded gambler has to take to be reinstated. Some states require a certification from a problem gambling professional indicating that the applicant is capable of controlled gambling.
Most of the people on Missouri's self-exclusion list will be eligible for reinstatement shortly: "The gaming commission said there are 16,148 people on the self-exclusion
list, and 11,427 of them could be eligible to remove themselves
starting March 31."