(a) All plant material and plant parts of Prunus (stone fruit) species other than P. avium, P. cerasus, P. effusa, P. laurocerasus, P. mahaleb, P. padus, P. sargentii, P. serotina, P. serrula, P. serrulata, P. subhirtella, P. yedoensis, and P. virginiana, except for seeds and fruit that is free of leaves and other plant parts. This includes, but is not limited to, trees, seedlings, root stock, budwood, branches, twigs, and leaves.

(b) Any other product or article that an inspector determines to present a risk of spreading plum pox when the inspector notifies the person in possession of the product or article that it is subject to the restrictions in the regulations.