Okla. Stat. tit. 52, § 52-46.1: Ammonia - Commercial fertilizers - Transportation by

pipeline.

Pipeline companies operating in this state as common carriers

and companies operating pipelines in this state for conveying

natural or artificial gas for public utility service may transport

by pipeline ammonia and other substances and materials comprising

commercial fertilizer or used in manufacturing commercial fertilizer

when specifically authorized to so do by the Oklahoma Corporation

Commission.