; and (II) determining which covered employer or covered employers shall be responsible for implementing and complying with the provisions of the standard applicable to the working conditions over which such employers have control. (viii) Procedures for conducting the annual evaluation under paragraph (6). (C) Availability of plan Each Plan shall be made available at all times to the covered employees who are covered under such Plan. (2) Violent incident investigation (A) In general As soon as practicable after a workplace violence incident, risk, or hazard of which a covered employer has knowledge, the employer shall conduct an investigation of such incident, risk, or hazard under which the employer shall— (i) review the circumstances of the incident, risk, or hazard, and whether any controls or measures implemented pursuant to the Plan of the employer were effective; and (ii) solicit input from involved employees, their representatives, and supervisors about the cause of the incident, risk, or hazard, and whether further corrective measures (including system-level factors) could have prevented the incident, risk, or hazard. (B) Documentation A covered employer shall document the findings, recommendations, and corrective measures taken for each investigation conducted under this paragraph. (3) Training and education With respect to the covered employees covered under a Plan of a covered employer, the employer shall provide training and education to such employees who may be exposed to workplace violence hazards and risks, which meet the following requirements: (A) Annual training and education shall include information on the Plan, including identified workplace violence hazards, work practice control measures, reporting procedures, record keeping requirements, response procedures, anti-retaliation policies, and employee rights. (B) Additional hazard recognition training shall be provided for supervisors and managers to ensure they— (i) can recognize high-risk situations