“Locally grown food” means food grown in Maryland. State schools and facilities shall give a preference under this regulation to procuring locally grown food. State schools and facilities shall include in procurement solicitations a price preference not exceeding 5 percent to bids or proposals for locally grown food. A procurement officer: Shall specify in any specific procurement solicitation a price preference not exceeding 5 percent; and May limit competition in any specific procurement solicitation to only locally grown foods. A price preference under this regulation cannot be used in conjunction with any other preference established in this chapter.