(1) Regulated articles from any area east of the Rocky Mountains, including all of Montana, Wyoming, Colorado, and New Mexico, are prohibited unless accompanied by a phytosanitary certificate with one of the following declarations:

(a) The hazelnut plants originate from a pest free area for eastern filbert blight.

(b) The hazelnut plants are micropropagated and shipped in artificial culture medium in sealed containers.

(2) Regulated articles from any area except the area addressed in subsection (1) of this section must be accompanied by a phytosanitary certificate stating that the hazelnut plants have been inspected by the certifying agency during the last active growing season and found free of eastern filbert blight.