(a) Revenue derived from passenger rail service on the Northwestern Pacific Railroad right-of-way south of Willits to Larkspur shall only be used for capital improvements to, and operating expenses of, the passenger rail service south of Willits to Larkspur.
(b) Real property on which the Northwestern Pacific Railroad right-of-way south of Willits to Larkspur is located shall not be pledged or mortgaged to fund capital improvements on the right-of-way north of Willits.