3 Pa.C.S. § 7108

Any grower of potatoes, agricultural, vegetable, tree and shrub seeds or plants vegetatively propagated and located in this Commonwealth may make application to the department for inspection and certification of his crop for seed or propagation purposes under such rules and regulations as the department may issue. The department or its authorized agents shall issue such certificates of inspection and designate or provide such official tags for marking containers of "certified seed" or "certified planting material" and establish such standards of grade and quality as are necessary to safeguard the privileges and services provided for in this chapter.