Laws set to go into effect next month would not have allowed the crude oil carried by a CSX train that exploded in West Virginia to be carried by rail. The oil contained a high level of volatile gas, the Wall Street Journal reports, citing a lab report. The laws set to be imposed in April will require such gases to be removed. The company that shipped the oil told the Journal that it had complied with all regulations. "We believe our sampling and testing procedures and results are in compliance…