Where a company using petroleum products in New Jersey makes purchases in New Jersey and also imports petroleum products into the State, and if, subsequently, it exports petroleum products outside the State by pipeline, barge or tank wagon, for example, such company shall use a "first in, first out" (FIFO) accounting method for petroleum products commingled in storage in New Jersey and subsequently exported from the State.
N.J. Admin. Code § 18:18A-4.3