hese rights. After all, the purpose of a statute of limitations is to “require diligent 152 See, e.g., comments of California Chamber and NCAE. 153 American Bus Association v. Slater, 231 F. 3d 1 (D.C. Cir. 2000), cited by California Chamber and NCAE, did not concern equitable tolling and is therefore inapposite. The cou