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You are visiting a job site and observe a worker who is installing siding on a building. The worker is standing on the top step of a ladder that is not long enough to reach the work area. Which of the following OSHA standards provides the best guidance for this situation?

1926.502(b)(15)
1925.503(b)(2)
Appendix B to Subpart M
1926.1053(b)(13)