Robert,
For this credit, “protect” requires ensuring the site's adaptive/native species are undisturbed by the project’s development, and that the project commits to protecting the designated area. This is reinforced by implementing specific practices (particularly during construction) to limit harm to the native or adaptive species on your project site, and committing to preserving the area as it is. During construction, this should include incorporating specific practices and requirements into construction documents such as specifying areas for lay-down, recycling and disposal, using paved areas for staging of construction activities, as well as using fencing around existing vegetation. Also, include specifics on areas for construction entrances and setbacks. It's a good idea to incorporate regular monitoring and inspections of the construction site to ensure these requirements are being implemented and followed. There is not mention of requiring a land trust or any legal action to meet the credit.