No person claiming exemption under the authority of § 4(b) of the Act [D.C. Official Code § 44-1703(b) (2001 Ed.)] shall solicit contributions until after that person has filed with the Director the proof of exemption required by this section.
In accordance with the Act, the exemption from the provisions of the Act and this chapter shall remain in effect only so long as the person continues to be exempt from federal taxation under the provisions of § 501 of the Internal Revenue Code of 1954.
Persons claiming exemption from the Act under the authority of § 4(b) shall file proof of the exemption with the Director.
Proof of exemption shall consist of the following:
D.C. Mun. Regs. tit. 16, r. 16-1303