Del. Code tit. 4, § 1311

Contracts related to the operation of a marijuana establishment licensed under this chapter are enforceable. A contract entered into by a licensed marijuana establishment or its employees or agents as permitted under a valid license, or by those who allow property to be used by a licensed marijuana establishment, its employees, or its agents as permitted under a valid license, is not unenforceable on the basis that cultivating, obtaining, manufacturing, distributing, dispensing, transporting, selling, possessing, or using marijuana is prohibited by federal law.