; limitation Payment permitted under subparagraph (A) shall be made on a monthly basis, and the period of rental may not exceed two months. (C) Payment amount The amount of payment allowed under subparagraph (A) for a month for the rental of a CRT item shall be 10 percent of the purchase price for the CRT item. (8) Definitions For purposes of this subsection: (A) HCPCS The term HCPCS refers to the Health Care Procedure Coding System. (B) Qualified CRT professional (i) In general The term qualified CRT professional means an individual who— (I) is certified by the Rehabilitation Engineering and Assistive Technology Society of North America as an assistive technology professional or is certified by another organization designated by the Secretary (acting in consultation with relevant parties) as providing a certification that is equivalent to, or more stringent than, the assistive technology professional certification; and (II) beginning two years after the establishment of the designation under clause (ii) , achieves an additional designation that demonstrates the individual’s competencies and experience in supplying CRT items. (ii) Establishment Not later than one year after the date of the enactment of this subsection, the Secretary, acting in consultation with relevant parties, shall establish the additional designation under clause (i)(II). (iii) Relevant parties For purposes of this subparagraph, the term relevant parties includes clinicians, consumer groups, CRT suppliers, and CRT manufacturers. (C) Qualified CRT service technician The term qualified CRT service technician means an individual who— (i) is factory-trained by the manufacturers of the CRT items being offered by the suppler of such items; (ii) is trained and educated (including through on-the-job training) to assemble, fit, program, service, and repair CRT items