Under such regulations as the Secretary shall prescribe, distilled spirits may be denatured on the bonded premises of a distilled spirits plant qualified for the processing of distilled spirits. Distilled spirits to be denatured under this section shall be of such kind and such degree of proof as the Secretary shall by regulations prescribe. Distilled spirits denatured under this section may be used on the bonded premises of a distilled spirits plant in the manufacture of any article.

Methanol or other denaturing materials suitable to the use for which the denatured distilled spirits are intended to be withdrawn shall be used for the denaturation of distilled spirits. Denaturing materials shall be such as to render the spirits with which they are admixed unfit for beverage or internal human medicinal use. The character and the quantity of denaturing materials used shall be as prescribed by the Secretary by regulations.