I'm working on a project with zoning ordinances but no open space requirements. The project is question is developing most of the site and the program requirements offer limited opportunities to provide open space. The site is a green field. The owner would like to use the Land Trust Option from the LEED Addenda to achieve this credit. I'm confused by the use of the words "previously developed" in the excerpt from the addenda below. Can the land trust path be used to achieve this credit if the site is not previously developed?

"Projects with limited landscape opportunities may also donate offsite land in perpetuity, equal to 60% of the previously developed area (including the building footprint), to a land trust within the same EPA Level III Ecoregion identified for the project site. The land trust must adhere to the Land Trust Alliance ‘Land Trust Standards and Practices’ 2004 Revision.