D.C. Mun. Regs. tit. 16, r. 16-336
Except as provided in this chapter, no dealer or holder shall exact from any buyer anything of value for any service or function in connection with the sale or financing of a motor vehicle or for the execution or recording of a release of a lien on a motor vehicle.
No person shall include in any retail installment contract any provision waiving or purporting to waive any provision of this chapter.
Any provision included in any retail installment contract which waives or purports to waive any provision of this chapter shall be void and of no effect.
No person shall include in any retail installment contract any provision which permits the holder arbitrarily or unreasonably to accelerate the installment payments required by the contract; Provided, that this subsection shall not be construed as prohibiting the purchaser from anticipating one or more installment payments.
D.C. Mun. Regs. tit. 16, r. 16-336