Montana just passed a new bill backed by longevity enthusiasts that will enable access to drugs and therapies that are not approved by the FDA.

A bill that allows medical clinics to sell unproven treatments has been passed in Montana.

Under the legislation, doctors can apply for a license to open an experimental treatment clinic and recommend and sell therapies not approved by the Food and Drug Administration (FDA) to their patients. Once it’s signed by the governor, the law will be the most expansive in the country in allowing access to drugs that have not been fully tested.

Zuzalu, a pop-up city in Montenegro has provided a temporary home for people who plan to set up a new jurisdiction to encourage biohacking and fast-track drugs that slow or reverse aging.

The bill allows for any drug produced in the state to be sold in it, providing it has been through phase I clinical trials—the initial, generally small, first-in-human studies that are designed to check that a new treatment is not harmful. These trials do not determine if the drug is effective.