Who is affected and how:

• State governments and local governments: Now explicitly covered under the OSH Act, these entities must ensure workplaces they operate meet applicable OSHA standards once the effective date applies to them. States without approved OSHA plans receive a 36‑month transition window, but they may still need to revise policies, procedures, budgeting, training, and compliance activities to meet federal standards.

• Public-sector employees (state and local workers): Workplace safety protections under the OSH Act are explicitly affirmed for these employees; they may see increased inspections, recordkeeping, and enforcement over time.

• Employers and supervisors in government workplaces: Will need to review and potentially change operations, safety programs, and training to meet federal OSHA requirements; these changes can create administrative and financial burdens without accompanying federal funding.

• Federal OSHA and State plan agencies: Must update guidance, communication, and enforcement plans to reflect the clarified coverage and manage the 36‑month transition for non‑plan States. Coordination with affected States and localities will be important to smooth implementation.

• Private-sector employers and workers: Indirectly affected where interactions with government workplaces or joint operations exist; the change is primarily clarifying rather than expanding private‑sector obligations.

Overall effects:

• Clarifies statutory scope and reduces ambiguity about whether States and their subdivisions fall under the OSH Act, which can improve consistency of protections.
• Introduces potential compliance costs at the State and local level without dedicated federal funding, raising concerns about unfunded mandates and prompting administrative planning. Legal challenges on federalism or sovereign immunity grounds are possible but not certain.

Implementation considerations:

• States without approved plans have three years to prepare; federal and State agencies will need to coordinate outreach, model policies, and technical assistance to reduce disruption.
• Employers and public agencies should inventory current practices, identify gaps with federal standards, budget for remediation, and schedule training to meet the applicable deadlines.