• The challenge in 1999 was that the only economic  "ecosystem values" readily available were those of Costanza et al. • The Project Steering Committee composed of participating government representatives, in approving the draft SAP and SCS GEF Project insisted that the project up-date the SAP and determine regionally applicable values for environmental goods and services. • The SCS Project established in 2003 a Regional Task Force of nine economists charged with this task which was completed successfully in March 2007.