(a) Credits or refunds granted administratively or judicially under this part shall earn interest at an annual rate of six percent (6%), computed from the date of payment of the taxes related to the credit or refund and until a date that precedes the date of the refund check by not more than thirty (30) days or, in the case of a credit, until the date on which the Secretary notifies to the taxpayer that the credit has been granted.(b) Refunds granted in connection with taxes or levies paid correctly in transactions made with or by tax-exempt persons shall not earn interest.(c) The amount of such credits or refunds with interest thereon, and the costs, if any, shall be credited or paid by the Secretary, chargeable to funds to which credit the product of such taxes had been originally covered into, and in the event of insufficiency in one fund, or when it impracticable to prorate such charge against various funds, chargeable to the General Fund of the Public Treasury. History —Jan. 31, 2011, No. 1, § 6025.03, retroactive to Jan. 1, 2011.