Has anyone completed the light pollution portion reductin of this credit?

Our project is an elementary school on a remote site that may accommodate future structures (classroom addition, staff housing, and a fire station). However, those structures are not within our scope.

Per signed resolution, the owner has agreed to uphold the requirements of SSc8 for all future development. The resolution included the SSc8 LEED requirements for reference, so future project teams could abide by the same rules as our LEED school. However, the LEED online form appears to assume we have already designed the future facilities, as it requests photometric plans/calcs for this hypothetical development...

Do you think our approach of getting the owner's commitment to uphold SSc8 requirements might work in lieu of submitting speculative plans/calcs?