20 U.S.C. § 7910

(a) Mandatory national testing or certification of teachers, principals, or other school leaders Notwithstanding any other provision of this chapter or any other provision of law, no funds available to the Department or otherwise available under this chapter may be used for any purpose relating to a mandatory nationwide test or certification of teachers, principals, other school leaders, or education paraprofessionals, including any planning, development, implementation, or administration of, or incentive regarding, such test or certification. (b) Prohibition on withholding funds The Secretary is prohibited from withholding funds from any State educational agency or local educational agency if the State educational agency or local educational agency fails to adopt a specific method of teacher or paraprofessional certification.