D.C. Mun. Regs. tit. 17, § 6410
6410.1 Each licensed optometrist owning or operating an optometry practice in the District shall maintain in good working order the equipment necessary to provide a routine eye examination which shall include, but not be limited to, the following minimum equipment:
6410.2 In addition to the requirements set forth in § 6410.1, the minimum equipment in an optometrist's office may also include a blood pressure measuring device.
SOURCE: Final Rulemaking published at 55 DCR 12043 (November 21, 2008).