D.C. Code § 29-305.52: Demand.

A shareholder shall not commence a derivative proceeding until:

(1)

A written demand has been made upon the corporation to take suitable action; and

(2)

Ninety days have expired from the date the delivery of the demand was made unless

(A)

The shareholder has earlier been notified that the demand has been rejected by the corporation; or

(B)

Irreparable injury to the corporation would result by waiting for the expiration of the 90-day period.