shall, at such time and place as the Secretary determines to be reasonable and appropriate, conduct security inspections and verifications of a covered chemical facility. (2) Requirements To ensure and evaluate compliance with this title, including any regulations or requirements adopted by the Secretary in furtherance of the purposes of this title, in conducting an inspection or verification under paragraph (1), the Secretary shall have access to the owners, operators, employees, and employee representatives, if any, of a covered chemical facility. (c) Unannounced inspections (1) In general In addition to any inspection conducted under subsection (b), the Secretary shall conduct unannounced facility inspections of covered chemical facilities assigned to tier 1 or tier 2 under section 2102(c)(1). (2) Requirements The inspections required under this subsection shall be— (A) conducted without prior notice to the owner, operator, or any employee of the covered chemical facility