This bill makes technical corrections to the existing Pechanga Band of Luiseno Mission Indians Water Rights Settlement Act. A primary amendment involves revising the definition of the Band's Reservation to explicitly include lands set aside by specific Executive orders and various land additions on particular dates. It further expands the definition to encompass any contiguous land held in trust for the Band on the enforceability date, as well as future contiguous lands within the Santa Margarita River Watershed placed into trust. Another key provision broadens the permissible uses of the Pechanga Water Quality Account , allowing funds to be used for general "activities to address water quality issues within the Wolf Valley Basin," rather than solely for "groundwater desalination activities." The bill also clarifies that these amendments do not affect the original settlement's enforceability date or the validity of the Secretary of the Interior's prior findings. Furthermore, it explicitly states that the changes do not alter any existing water rights.