; and (B) permit each covered chemical facility that submits a site security plan to select a combination of security measures that satisfy the risk-based chemical security performance standards established by the Secretary under this subsection. (f) Collocated chemical facilities The Secretary may allow an owner or operator of a covered chemical facility that is located geographically close, as determined by the Secretary, to another covered chemical facility to develop and implement coordinated security vulnerability assessments and site security plans. (g) Alternate security programs as component of security vulnerability assessment and site security plan (1) Acceptance of program At the request of an owner or operator of a covered chemical facility, the Secretary may accept an alternate security program submitted by the owner or operator as a component of the security vulnerability assessment or site security plan required under this section, if the Secretary determines that the alternate security program, in combination with other components of the security vulnerability assessment and site security plan submitted by the owner or operator of the covered chemical facility— (A) meets the requirements under this title and the regulations promulgated under this title; (B) provides the level of security that is equivalent to the level of security required under this title and the regulations promulgated under this title; and (C) includes employee participation as required under subsection (a)(1)(B)(iii). (2) Secretarial review required Nothing in this subsection shall relieve the Secretary of the obligation to— (A) review a security vulnerability assessment or site security plan submitted by a covered chemical facility under this section