Del. Code tit. 31, § 4110

Inspection of premises and the issuing of orders in connection therewith under this chapter shall be the exclusive responsibility of the code official. When, in the opinion of the code official, it is necessary or desirable to have inspections of any conditions by any other community or state agency, the code official shall arrange for this to be done in such a manner that the owners or occupants of the dwelling shall not be subjected to visits by numerous inspectors nor to multiple or conflicting orders. No order for correction of any violation under this section, when coordination of enforcement is required, shall be issued without the approval of the code official and, before issuing any such order, the code official shall obtain the concurrence of any other department or agency having jurisdiction thereover.