Vt. Stat. Ann. tit. 6, § 1105

No person shall sell, use, or apply dichloro-diphenyl-trichloro-ethane, sometimes referred to as DDT, on or after December 31, 1971, except when the Secretary certifies that an emergency exists that requires its use. When the Secretary finds that an emergency exists and so certifies, he or she shall prescribe the conditions under which and the period for which it may be used.