D.C. Mun. Regs. tit. 21, r. 21-5407
No person shall engage in the testing of backflow preventers unless the person possesses a valid certification issued by the General Manager.
Applications for certification to test backflow preventers shall be made to the General Manager on a form prescribed by the General Manager. Certification shall be for a three (3) year term.
Each person applying for certification shall submit to the General Manager under oath, such information as the General Manager may require to assist in the determination whether the applicant has sufficient experience, training or education in testing backflow preventers.
Application and certification fees shall be set by the General Manager, and shall be submitted with the application to the General Manager.
If the General Manager finds that an applicant has the required qualifications, the General Manager shall issue the certification.
Certifications issued pursuant to this chapter shall not be transferable.
D.C. Mun. Regs. tit. 21, r. 21-5407