D.C. Mun. Regs. tit. 17, § 2407
2407.1 The Mayor shall issue certifications (authentications) of seals and signatures of notaries appointed in the District of Columbia pursuant to §558 of An Act To establish a code of law for the District of Columbia, approved March 3, 1901 (31 Stat. 1279; D.C. Code §1-801 et seq., (1981) and this chapter.
2407.2 The following fees shall be charged for the issuance of certifications of notaries public under this section:
(a) 'A' Certificate'... $15.00
(b) 'Foreign Certificate'... $15.00
(c) 'B' Certificate'... $15.00
(d) 'Apostille'... $15.00
SOURCE: §§ 1.7(a) and 1.7(b) of Regulation No. 73-13, approved May 24, 1973, 19 DCR 1147 (June 11, 1973), as added by § 302 of District of Columbia Revenue Act of 1983, D.C. Law 5-14; as amended by Final Rulemaking published at 43 DCR 3365 (June 30, 1995); as amended by Final Rulemaking published at 57 DCR 5052 (June 11, 2010).