D.C. Code § 7-741.04: Penalties.

An employer or person who willfully violates the requirements of this chapter by:

(1)

Smoking in a prohibited area shall be subject to a fine of not less than $100 or more than $1,000; subsequent offenses shall be subject to a fine of not less than $200 or more than $1,000;

(2)

Obscuring, removing, defacing, mutilating or destroying any sign posted in accordance with the provisions of this chapter shall be subject to a fine of $500; or

(3)

Failing to post or maintain warning signs describing the prohibited activity and failing to notify a person observed to be smoking to stop the activity, as required by this subsection, shall be subject to a fine of $500; each day that a violation continues shall constitute a separate offense.