70 ILCS 1570/6

The submerged lands thus granted and the shore lands and interests therein and riparian rights appurtenant thereto, and the right to impose restrictions thereon thus acquired in accordance with the preceding sections the Commissioners of Lincoln Park shall hold for the following uses:

1. For the purpose of filling, reclaiming, improving, maintaining and holding the same as a public park;

2. For the purpose of constructing and maintaining boulevards, driveways and parkways for public convenience;

3. For the purpose of creating, constructing and maintaining lagoons and harbors for boats and for establishing and maintaining rules and regulations for the use thereof by the public;

4. For park purposes generally.