Section 157National Internal Revenue Code of 1997 (Republic Act No. 8424), Sec. 157

Removal of Articles After the Payment of Tax. - When the tax has been paid on articles or products subject to excise tax, the same shall not thereafter be stored or permitted to remain in the distillery, distillery warehouse, bonded warehouse, or other factory or place where produced. However, upon prior permit from the Commissioner, oil refineries and/or companies may store or deposit tax-paid petroleum products and commingle the same with its own manufactured products not yet subjected to excise tax.

Imported petroleum products may be allowed to be withdrawn from customs custody without the prepayment of excise tax, which products may be commingled with the tax-paid or bonded products of the importer himself after securing a prior permit from the Commissioner: Provided, That withdrawals shall be taxed and accounted for on a 'first-in, first-out' basis.