D.C. Code § 22-3751

Any person who commits an offense listed in § 22-3752 against a taxicab driver who, at the time of the offense, has a current license to operate a taxicab in the District of Columbia or any United States jurisdiction and is operating a taxicab in the District of Columbia may be punished by a fine of up to one and 1 /2 times the maximum fine otherwise authorized for the offense and may be imprisoned for a term of up to one and 1 /2 times the maximum term of imprisonment otherwise authorized for the offense, or both.