In South Dakota, what is the proper procedure for disposing of a school district's library materials?

Any school district library may discard over-duplicated, outdated, inappropriate, or worn library materials. However, these materials must be marked clearly with the words: "Discarded, __________ School District Library" wherever the property label of such library appears. The discarded materials may be given to other libraries or to nonprofit agencies, destroyed, offered for public sale, or traded to a vendor for future library material purchasing credits.