Del. Code tit. 15 § 7711
The Department shall cause to be printed and distributed the ballots for the election of delegates in the quantity and in the manner provided by law for general elections; provided that such ballots as are required under the election laws to be delivered to the chairs of the various political parties shall, in lieu thereof, be distributed to the various nominees as equally as possible, and provided further that the Department, in addition to the ballots mentioned in this section, shall cause to be printed such further number of ballots as shall be directed by any nominee in any county; provided, however, that the Department shall not have printed any ballots upon the order or request of any nominee, unless the request shall have been made to him or her in writing at least 10 days prior to the holding of the election at which the ballots are to be used, nor unless a deposit sufficient to cover the cost of the ballots be made at the time they are ordered. The ballots so ordered by the nominees shall be delivered to the nominees or to their agents upon their request or order at least 5 days before the election at which the ballots are to be used.
15 Del. C. § 7711