; (ii) prepare, implement, and submit to the Secretary a site security plan for the covered chemical facility that addresses the security vulnerability assessment and meets the risk-based chemical security performance standards established under subsection (c); (iii) in developing the security vulnerability assessment and site security plan, include participation by— (I) not less than 1 supervisory employee of the covered chemical facility; (II) not less than 1 nonsupervisory employee of the covered chemical facility; and (III) not less than 1 employee representative from each bargaining agent at the covered chemical facility, if any; and (iv) include, with the submission of the security vulnerability assessment and the site security plan of the covered chemical facility, a signed statement by the owner or operator of the covered chemical facility that certifies that the submission is provided to the Secretary with knowledge of the possible penalties under section 2107; (C) set deadlines, by tier, for the completion of security vulnerability assessments and site security plans; (D) upon request, as necessary, and to the extent that resources permit, provide technical assistance to a covered chemical facility conducting a security vulnerability assessment or site security plan; (E) establish specific deadlines and requirements for the submission by a covered chemical facility of information describing— (i) any change in the use by the covered chemical facility of more than a threshold amount of any substance of concern that may affect the requirements of the covered chemical facility under this title; or (ii) any material modification to the operations or site of the covered chemical facility that may affect the security vulnerability assessment or site security plan submitted by the covered chemical facility; (F) require the owner or operator of a covered chemical facility to review and resubmit a security vulnerability assessment or site security plan not less frequently than once every 5 years