; (B) designed to evaluate at the covered chemical facility undergoing inspection— (i) the ability of the covered chemical facility to prevent a chemical facility terrorist incident that the site security plan of the covered chemical facility is intended to prevent; (ii) the ability of the covered chemical facility to protect against security threats that are required to be addressed by the site security plan of the covered chemical facility; and (iii) any weaknesses in the site security plan of the covered chemical facility; (C) conducted so as not to affect the actual security, physical integrity, safety, or regular operations of the covered chemical facility or the employees of the covered chemical facility while the inspection is conducted; and (D) conducted— (i) every 2 years in the case of a covered chemical facility assigned to tier 1