When the city of Philadelphia decides on a legal team to help it explore a deal divesting Philadelphia Gas Works, attorneys said facilitating the sale of the municipally owned utility would reflect anything but a run-of-the-mill deal.

As Lamb McErlane business and real estate lawyer Vincent Donohue put it, the possible transaction — potentially worth $1.85 billion — would bring with it a host of interested parties, each wielding its own set of terms, and the lawyers hired would need an interdisciplinary arsenal of skills to understand all of the parties’ baseline requirements.