DOL Finalizes Fiduciary Exemption Consistent with Best Interest Standard Investment professionals can collect payment for a wider range of transactions, so long as they satisfy the reinstated ‘five-part test’ for fiduciaries. The US Department of Labor (DOL) on Tuesday finalized a fiduciary exemption under the best interest standard, allowing investment advisers to collect payment for a wider range of advice. The exemption is part of broader regulation for retirement plans under the Employee Retirement Income Security Act (ERISA) that also reinstates the “five-part test” to determine fiduciary status, in line with the best interest standard—called Regulation Best Interest (Reg BI)—put forth by the Securities and Exchange Commission (SEC), according to the DOL. The regulation is called the “Improving Investment Advice for Workers & Retirees Exemption.”