CFR›Title 42›Chapter I›Part 81›Subpart D ContainsSections 81.10–81.12CorpusDaily eCFRDisplayed edition2026-06-23Last updated2026-06-23 Subpart D—Requirements for Risk Models Used To Estimate Probability of Causation Sections 81.10 § 81.10 Use of cancer risk assessment models in NIOSH IREP. 81.11 § 81.11 Use of uncertainty analysis in NIOSH-IREP. 81.12 § 81.12 Procedure to update NIOSH-IREP. Previous C Subpart C—Data Required To Estimate Probability of Causation Next E Subpart E—Guidelines To Estimate Probability of Causation