Del. Code tit. 14 § 411
If a child for whom an application has been submitted pursuant to this chapter has been suspended or expelled, or has been absent from school without a valid excuse for more than 15 school days during a school year, in the district of residence, the board of the receiving district may, in its sole discretion, refuse to consider the application or refuse to approve the application, or refuse to enroll the child in the receiving district until the child has been reinstated in the district of residence, provided, however that nothing in this section shall be construed to enlarge upon the authority of any district to accept for re-enrollment any student who has been expelled from a school district in this State, as such authority is limited by the provisions of § 4130 of this title. Valid excuse shall have the same meaning as in § 2721 of this title.
14 Del. C. § 411