CCL President Robert S. Peck received the 2020 Amicus Award from the International Municipal Lawyers Association (IMLA). The award recognizes Peck for his work on behalf of municipalities. Most recently, Peck provided pro bono representation to IMLA, the National League of Cities, and the U.S. Conference of Mayors in a series of lawsuits involving climate change that were pending in the First, Fourth, Ninth, and Tenth Circuits, articulating the reasons why appellate review of an attempt to remove these cases from state to federal court should be limited to whether the defendant oil companies can claim federal officer status. Originally, the presentation of the award was to take place at IMLA's 2020 Convention in Washington, DC, but the convention was cancelled in light of the Covid-19 pandemic.

    Peck has also represented a number of U.S. cities as plaintiffs in fair housing litigation, seeking to challenge discriminatory mortgage lending practices. Those cities have included Los Angeles, Philadelphia, Miami, Miami Gardens, Oakland, and Sacramento.