(a) No hearing aid shall be sold to any person unless accompanied by a 30-day money-back written guarantee providing that if the person returns the hearing aid in the same condition, ordinary wear and tear excluded, as when purchased within 30 days of the date of delivery, the customer shall be entitled to the refund of the purchase price of the hearing aid and accessories as itemized on the receipt provided under section 504¹ within 30 days of return of the hearing aid and accessories.

(b) A hearing aid that has been refinished and totally reconditioned by the manufacturer or by the manufacturer's agent and the manufacturer or manufacturer's agent certifies that the hearing aid meets all the acoustical standards of a new hearing aid and is in all other respects the equivalent of a new hearing aid with all warranties and guarantees that accompany a new hearing aid shall be considered to be a new hearing aid and so designated and shall be subject to the right of refund under subsection (a).

(c) Notwithstanding the provisions of subsection (a), a hearing aid dealer may retain as a cancellation fee for return of a hearing aid and accessories a charge not to exceed the lesser of 10% of the purchase price or $150.