Del. Code tit. 18, § 7706

The expenses incurred by any public officer for suretyship upon any bond required by law of him or her, as well as the expenses for suretyship upon any bond required of any of his or her assistants or clerks, shall, where the bond or bonds are required for the protection of the State, be paid for by the State, and where the bond or bonds are required for the protection of any of the several counties, be paid for by the Levy Court or County Council of the county, and where the bond or bonds are required for the protection of a municipality, be paid for by the municipality, and shall be charged to and considered a part of the expenses of the office held by the official. The cost of the bond shall not exceed the sum or sums determined by any applicable rate filed by the surety with the Insurance Commissioner.