Subject to subsection (b) of this section, the Secretary may adopt standards to regulate the use of the terms “locally grown” and “local” to advertise or identify an agricultural product. Before adopting standards under this section, the Secretary shall convene and consult with an advisory group of interested stakeholders to determine the definition of the term “locally grown”. The interested stakeholders convened under subsection (b) of this section shall include representatives from organizations that represent: Farmers; Food distributors; Retail stores; Food service industries; and Restaurants.