I was digging through the collective bargaining agreement and I came across what many call The Nowitski Clause:
Article IX, Section 1, (c) : the Dallas Mavericks must always employ a slightly goofy, white forward with a decent jump shot.
After discovering this, I did a little research and found that the Mavs have complied with this ruling since 2003, predating the adoption of the latest CBA.
Exhibit A:
Exhibit B:
Exhibit C: