Del. Code tit. 29 § 6336
The standing committees of each House in charge of the Budget Appropriation Bill shall sit jointly in open session while considering the budget and the Budget Appropriation Bill and they shall begin such joint meetings within 5 days after the budget and the Budget Appropriation Bill have been submitted to the General Assembly by the Governor. This joint committee may cause the attendance of heads or responsible representatives of the agencies of the State asking for financial aid and compel the furnishing of such information and the answering of such questions as the joint committee shall require, and to these sessions all persons interested in the estimates under consideration shall be admitted with the right to be heard. The Governor, or the Governor's representative, and the Governor-elect shall have the right to sit at these public hearings and be heard on all matters coming before the joint committee.
29 Del. C. § 6336