In addition to entries by freight or express provided for in §319.41–5, importations are permitted by mail of mature corn on the cob from the countries specified in §319.41–1(b)(2), and clean shelled corn and clean seed of the other plants covered by §319.41, provided that a permit has been issued for the importation in accordance with §§319.7 through 319.7–5 and all conditions of the permit are met.