Although U.S. electricity regulators are moving toward a consensus on transmission planning, cost allocation details remain a stumbling block. Ballard Spahr partner Howard H. Shafferman, a former Federal Energy Regulatory Commission chief of staff, said in a video interview that the basic principles of regional transmission planning are widely understood. But he added that FERC commissioners face the difficult task of navigating the evolving relationship between federal and state electricity market and planning guidelines.

It’s all about who gets to keep the money, Mr. Shafferman said.