In 1954, Brown v. Board of Education overturned the Plessy v. Ferguson ruling.

While the Board of Estimate overturned only 18 designations in 25 years, it had another kind of restraint.

The city designated it a landmark in 1989, but the Board of Estimate overturned the designation later that year.

Two months later, however, in a rare move, the Board of Estimate overturned the designation.

The Board overturned the veto of Mayor Gavin Newsom on November 23 to pass the law.

In 1954, the Brown v. Board of Education overturned the "separate but equal" doctrine, but it was not specific on remedies that educational systems had to take to remove discrimination.

Two months later, the Board of Estimate overturned the designation.

The Board uncovered "egregious error" in the prosecution, overturned the convictions, issued retroactive honorable discharges to the defendants and ordered back pay.

The company asked the Board to overturn the election because the union had distributed a leaflet on election day questioning whether the company had made a profit.

Truesdale's term as chair of the NLRB lasted just over two years, and during that time the Board neither overturned much precedent nor generated new doctrine.