It argued that a national standard would be preferable to a "patchwork" of state rules.
Replacing many knots of state rules with a big knot of federal rules would defeat the purpose, he said.
Speaking after the conference, John Kerry, the US secretary of state, ruled out coordination with Iran in any US-led campaign.
The F.D.A. regulates manufacturers, but compounders register as pharmacies, putting them under a patchwork of state rules.
They contend that her years as an assistant attorney general for the state have been spent mainly handling mundane matters like violations of state rules about dock sizes.
They contend that her years as an assistant attorney general for the state were mainly spent handling mundane matters like violations of state rules about dock sizes.
This led to endless legal battles, created a patchwork of state rules and, more ominously, opened the way for new logging projects in several states.
To those seeking a ban on hydraulic fracturing, no set of state rules would suffice to safeguard water supplies, public health and the environment.
One of Mr. Johnson's arguments was that a "national solution" to carbon dioxide emissions was preferable to a "confusing patchwork of state rules".
John Kerry, the US secretary of state, ruled out direct military intervention, and said the partial lifting of the arms embargo would have to be carefully sculpted.
