What is a main reason OSHA will not be enforcing certain sections?

OSHA may not enforce certain sections due to a lack of need for enforcement. This situation arises when assessments indicate that compliance with safety regulations is already being maintained adequately within the industry, or when the potential risk associated with certain chemicals or practices has been deemed low enough that regulatory enforcement would not significantly improve safety outcomes. This approach allows OSHA to focus its resources and efforts on areas where there is a greater risk to worker health and safety.

The other choices suggest different reasons that, while they may influence OSHA's decisions or the need for regulatory updates, do not directly explain the agency's decisions regarding enforcement. Regulatory changes in chemical use, insufficient training for workers, and changes in industry standards all relate to the broader context of workplace safety but do not align with the specific rationale relating to when enforcement may not be necessary.