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  4. Regulations
  5. 45 CFR 46
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    • 45 CFR 46
      • Subpart B
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      • List of Expedited Categories (1998)
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45 CFR 46

The HHS regulations for the protection of human subjects in research at 45 CFR 46 include five subparts. Subpart A, also known as the Common Rule, provides a robust set of protections for research subjects. The Common Rule, subpart A, was revised in recent years (the “2018 Requirements”). Subparts B, C, and D provide additional protections for certain populations in research. Subpart E provides requirements for institutional review board registration. Access the regulatory language using the links below.

2018 Requirements - official e-Code of Federal Regulation

Exemptions - official e-Code of Federal Regulation

Subpart B Additional protections for research with pregnant women and fetuses

Subpart C Additional protections for research with prisoners

Subpart D Additional protections for research with children

Subpart E Requirements for IRB registration

List of Expedited Categories (1998)

In general, research initiated before January 21, 2019 continues to comply with the pre-2018 Common Rule unless the institution chose to transition it to the revised Common Rule.

Pre-2018 Common Rule

Content created by Office for Human Research Protections (OHRP)
Content last reviewed February 11, 2025
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