Here is more information about pure endowments and quasi endowments.
Pure endowments
Pure endowments exist into perpetuity and are invested accordingly. Distributions pursuant to the CU Foundation's Spending Policy are available for the fund purpose.
Quasi endowments
Gifts to quasi endowments are invested and distributions pursuant to the CU Foundation's Spending Policy are available for the fund purpose. However, under circumstances described in the fund documents, all or a portion of a quasi endowment may also be appropriated for the fund purpose.