D.C. Code § 13-331
This chapter does not limit or affect the right to serve process in any other manner now or hereafter required or permitted by:
Dec. 23, 1963, 77 Stat. 513, Pub. L. 88-241, § 1
July 29, 1970, 84 Stat. 552, Pub. L. 91-358, title I, § 142(4)
1973 Ed., § 13-331.
1981 Ed., § 13-331.
Insurance companies, service of process upon, see §§ 31-4323 and 31-2502.23.
Corporations, service of process upon, see § 29-612.
Attachment and garnishment proceedings, service of process in proceedings, see § 16-502.