The Pennsylvania Supreme Court dismissed two consolidated appeals on January 6, 2026, ending a regulatory authority dispute between the state's environmental regulators and legislative oversight bodies.

The dismissed cases (106 MAP 2023 and 107 MAP 2023) involved Jessica Shirley, interim acting secretary of the Department of Environmental Protection and interim acting chairperson of the Environmental Quality Board, who had challenged decisions by the Pennsylvania Legislative Reference Bureau. The litigation originated from orders issued by the Commonwealth Court on November 1, 2023.

In the first case, Shirley and the DEP had appealed Commonwealth Court rulings while challenging the authority of the Legislative Reference Bureau and its director, Stephanie Fielder Latimore, along with Amy J. Mendelsohn, director of the Pennsylvania Code and Bulletin.

The second consolidated case featured multiple energy and coal industry entities as parties opposing the DEP's position. The appeals were discontinued through application to the court rather than being decided on the merits, leaving the underlying regulatory authority questions unresolved by the state's highest court.