(a) Any city or city and county may expend any money received by it pursuant to Section 11005 for:
(1) Planning, acquiring, constructing, operating, or maintaining a rapid transit system itself or jointly with one or more other cities, counties, cities and counties, or public rapid transit districts, agencies, or authorities; or
(2) Making contributions to any public rapid transit district, agency, or authority exercising jurisdiction within the city or city and county for use in planning, acquiring, constructing, operating, or maintaining a rapid transit system.
(b) A county may expend such money in making contributions to any city or public rapid transit district, agency, or authority within the county for use in planning, acquiring, constructing, operating, or maintaining a rapid transit system.