I saw in the Federal Register a proposal for comment on contracting (letting of contracts) to prepare rulemaking for containment of emissions from funnels. The justification cited is reduction of volatile airborne emissions, and concern on use of funnels by "homeowners" and other untrained persons outside the petrochemical industry. some type of self closing funnel was described, similar to the gas can fuel control system now in use. implementation date was listed as 2016 in california coastal area and NE USA