Del. Code tit. 2, § 706

The Department may determine the charges or rental for the use of any properties and the charges for any service or accommodations under its control and the terms and conditions under which these properties may be used. No charge or rental under this section shall deprive the public of its rightful, equal, and uniform use of such property. Charges shall be reasonable and uniform for the same class of service and established with due regard to the property and improvements used and the expenses of operation to the State. The State shall have and the Department may enforce liens, as provided by law for liens and the enforcement thereof, for repairs to or improvement or storage or care of any personal property, to enforce the payment of any such charges.