D.C. Mun. Regs. tit. 15, r. 15-1306
If total obligations of the Commission or the Office of the People's Counsel are less than ninety-five percent (95%) of total appropriations for the Commission or the Office of the People's Counsel as determined by the Office of the Chief Financial Officer in the annual audit released in the month of February of each year, the Commission or the Office of the People's Counsel shall cause the difference to be refunded or credited against the next year's assessment to the public utilities, competitive electric suppliers, competitive natural gas suppliers, and CLECs according to the formula under § 1301, within one hundred fifty (150) days following the end of the fiscal year. The decision to refund or credit the difference shall be at the Commission's discretion.
If a recalculation of assessments would result in an over-collection of funds to reimburse the appropriated budgets of the Office of the People's Counsel or the Commission in a given fiscal year, this over-collection shall be refunded or credited against the next year's assessments to the public utilities, competitive electric suppliers, competitive natural gas suppliers, and CLECs according to the formula under § 1301. The decision to refund or credit the difference shall be at the Commission's discretion.
D.C. Mun. Regs. tit. 15, r. 15-1306