Delaware Code
Subchapter VI. Rent Increase Justification
§ 7055. Penalties [For application of this section, see 79 Del. Laws, c. 304, § 7].

A community owner who raises a homeowner's rent more than the annual average increase of the CPI-U for the preceding 36-month period without complying with this subchapter, must immediately reduce the rent to the amount in effect before the unauthorized increase and rebate the unauthorized rent collected to the homeowners with interest. The Department of Justice shall have authority over this section.