Each interrogatory shall be restated as numbered and shall be answered separately and fully in writing under oath, unless it is objected to, in which event the reasons for objection shall be stated in lieu of an answer. The answers are to be signed by the person making them, and the objections signed by the attorney making them. The party upon whom the interrogatories have been served shall serve a copy of the answers, and objections if any, within 30 days after the service of the interrogatories, except that a defendant may serve answers or objections within 45 days after service of the summons and complaint upon that defendant. The Court may allow a shorter or longer time. The party submitting the interrogatories may move for an order under Rule 37(a) with respect to any objection to or other failure to answer an interrogatory.
Interrogatory answers filed pursuant to Rules 3(h)(1)(I) and 5(d)(1) need not be answered under oath by a party if the answers are signed by the attorney making them. If a party elects to file answers signed by the attorney, sworn answers signed by a party shall be filed within 30 days of the date when the answers signed by the attorney are filed.
All interrogatories as served shall contain a reasonable amount of blank space after the question to permit the insertion of the answer.
An interrogatory otherwise proper is not necessarily objectionable merely because an answer to the interrogatory involves an opinion or contention that relates to fact or the application of law to fact, but the Court may order that such an interrogatory need not be answered until after designated discovery has been completed or until a pretrial conference or other later time.
Del. R. Civ. P. Super. Ct. 33