View as webpage TDI adopts rule on group capital calculation The Texas Department of Insurance (TDI) has adopted a rule based on an NAIC model act and regulation for the group capital calculation, effective November 7, 2022. The new rule will require certain insurers to file a group capital calculation with their registrations. View the adoption order (PDF) for the full text. For other dates and documents related to this action, visit TDI’s 2022 rules webpage.