The Department may issue a permit to engage in aquaculture activities authorized by law and these regulations, after receipt and approval of a completed application. Permits issued by the Department shall be: Valid for a 5-year period, and expire on December 31 of the fifth year after issuance; Issued for each facility separately. Permits issued by the Department are not transferrable. Permits may be modified or amended upon request of the permittee, or at the direction of the Department. The Department may deny a permit application to possess species of fish or aquatic plants which may have an adverse impact on fish populations or their ecosystems.