Enforcement Rules of Value-added and Non-value-added Business Tax Act<br> Article 42
Where as business entity which computes its business tax based on the provisions of Section I of Chapter IV of the Act and has overpaid business tax as a result of applying zero tax rate under Article 7 of the Act, the amount of the tax refundable shall be the amount calculated by imposing on the zero-tax rate sales amount the tax rate prescribed in Article 10 of the Act.