Del. Code tit. 19, § 3356

If the Federal Unemployment Tax Act [26 U.S.C. § 3301 et seq.] is amended by the Congress of the United States to permit a maximum of credit against such federal tax higher than the 90 percent maximum rate of credit now permitted under § 3302(c) of the Internal Revenue Code [26 U.S.C. § 3302(c)] to an employer with respect to this chapter, then for any such employer, liable under the federal statute, the employer’s contribution rate under this chapter shall be that determined in §§ 3350 or 3350A of this title plus the 3/10 of 1 percent additional offset credit permitted under federal law.