The Council of the District of Columbia is authorized from time to time to provide by regulation for (1) the exemption from the provisions of this chapter of any loan or financial transaction, and (2) the change of any interest rate specified in this chapter. The Council is further authorized to amend or repeal any such regulation at any time, but no such amendment or repeal relating to any exemption made under authority of this section shall affect any such loan or financial transaction lawfully made or entered into while such exemption is in effect.
D.C. Code § 28-3309