Exotic weeds require what for legal sale or use?

Exotic weeds often require a government-issued permit for legal sale or use due to their potential to disrupt local ecosystems, agricultural practices, and native species. The regulation is in place to control and manage the introduction of non-native plant species, which can become invasive and affect biodiversity and local agriculture. These regulations help ensure that any sale or usage of exotic weeds is monitored to mitigate adverse environmental impacts. Having a government-issued permit indicates compliance with agricultural and environmental laws meant to protect local ecosystems and agricultural integrity. This is vital in promoting responsible stewardship of land and resources.