Section 372.625 - Textbooks1. To qualify for an exemption pursuant to NRS 372.287 and 374.292, a book must be: (a) Authorized for use as a textbook within the Nevada System of Higher Education by the Board of Regents or its designee; and(b) Purchased from a retailer in Nevada by a student who is enrolled at a university or college that is a part of the Nevada System of Higher Education.2. Each retailer shall: (a) Maintain the records of sales of exempt textbooks separately from the records of sales of other tangible personal property; and(b) Ensure that the records of sales of exempt textbooks are adequate to substantiate the exemption.