In the Western Cape, developers retain the legal liability for the biodiversity outcomes even in the event that they purchase it from a third-party provider. Many offsets programmes therefore require financial assurances from offset suppliers to provide certainty that sufficient funding will be available. For programmes where perpetual land management is required, non-wasting endowment funds are a common funding instrument where the annual interest earned on the principal sum is used to fund ongoing land management (DOD and EPA, 2008).