As you may know, NIST recently published a new version of the NIST SP 800-63 specification. To better align with the new levels of assurance that this updated specification defines, NIEF has defined three new assurance level attributes within the NIEF Attribute Registry as a new Assurance Level Attribute Bundle.  NIEF encourages participating Identity Providers to add support for these new attributes.  These attributes do not map precisely to the legacy assurance attributes, but many of the same underlying security principles dictate the appropriate levels of assurance.  If you have any concerns about what levels of assurance are appropriate for your IDP to assert, feel free to reach out to help@nief.org.