Except for persons identified in COMAR 26.13.05.01 A(3) or D, 26.13.06.01A(4) or (5), or 26.13.07.23A(1), a person may not operate any facilities without first obtaining a valid CHS permit from the Department. A CHS permit will not be issued without the facility first having applied for an EPA identification number. A person may not begin physical construction of a new facility without having submitted a complete permit application and having received a final permit under this chapter. A facility that is no longer operating but is maintained to permanently contain CHS and does not receive any additional CHS shall also be required to obtain a valid permit from the Department. A permit may be issued or denied for one or more units at a facility without simultaneously issuing or denying a permit to all of the units at the facility. Record Keeping. Applicants shall keep records of all data used to complete permit applications and any supplemental information submitted under this chapter for a period of at least 3 years from the date the application is signed.