Va. Code Ann. § 10.1-624

The trustees may, with the approval of the directors of the soil and water conservation district or districts, employ such officers, agents, and other employees as they require, and shall determine their qualifications, duties and compensation. The district directors shall provide for the execution of surety bonds for the treasurer and such other trustees, officers, agents, and employees as shall be entrusted with funds or property of the watershed improvement district, and shall publish an annual audit of the accounts of receipts and disbursements of the watershed improvement district.