Del. Code tit. 2, § 910

No person shall build, rebuild, create, or cause to be built, rebuilt or created any object, or plant, cause to be planted or permit to grow higher any tree or trees or other vegetation, which shall encroach upon any airport protection privileges acquired pursuant to this chapter. Any such encroachment is a public nuisance and may be abated in the manner prescribed by law for the abatement of public nuisances, or the political subdivision in charge of the airport or restricted landing area for which airport protection privileges have been acquired under this chapter may go upon the land of others and remove any such encroachment without being liable for damages in so doing.