Del. Code tit. 21 § 4112
No person shall, without lawful authority, attempt to or, in fact alter, damage, deface, injure, twist, knock down, interfere with the operation of or remove any public roadway, bridge, drain, light, gate or traffic-control device, railroad sign or signal or other appurtenance or any inscription, shield or insignia thereon or any other part thereof or other type of highway signs erected by the State regardless of whether such sign is classified as regulatory or informational. Whoever violates this section shall, for the first offense, be fined not less than $57.50 nor more than $230, or imprisoned for not more than 10 days, or both. For each subsequent like offense committed within 2 years, the person shall be fined not less than $115 nor more than $460, or imprisoned for not more than 30 days, or both. Whoever violates this section shall in addition to any fine or incarceration make restitution to the State for actual costs incurred to replace the traffic-control device.
21 Del. C. § 4112