The bill proposes to designate the black swallowtail butterfly (Papilio polyxenes) as the official butterfly of the state of Michigan. This designation aims to recognize the significance of the black swallowtail butterfly within the state's natural heritage and promote awareness of its ecological importance.

The bill includes a provision stating that it will take effect 90 days after being enacted into law. This timeline allows for a smooth transition into the new designation, ensuring that the black swallowtail butterfly is officially recognized in a timely manner.