MS HB1684

Levies a 1.5% sales tax on manufacturing or processing machinery sold for use at petroleum refineries and a 3.5% tax on construction activities performed at refineries in Mississippi

Allows refinery owners holding a direct pay permit to pay taxes directly to the Department of Revenue, relieving sellers and contractors from collection duties

Defines "refinery" as facilities manufacturing finished petroleum products from crude oil, natural gas liquids, or other hydrocarbons, excluding terminals and bulk plants where products are only blended

Excludes design and engineering costs from the taxable "total contract price" for projects exceeding $100,000,000

Provisions related to the new refinery tax (Section 27-65-24) are set to repeal on July 1, 2011