The district may, without limitation by any other provisions of this part requiring approval of indebtedness, accept contributions of money, grants, loans, rights-of-way, labor, materials, and any other property from the state or the United States, or any department, instrumentality, or agency thereof, or from any public agency for the acquisition, construction, maintenance, and operation of rail transit facilities. The district may, without limitation by any other provisions of this part, enter into any contract and cooperate with and accept cooperation from

the state or the United States, or any department, instrumentality, or agency thereof, or any public agency in the acquisition, construction, maintenance, and operation of, and in financing the acquisition, construction, maintenance, and operation of, any rail transit facilities. The district may do any and all things necessary in order to obtain the aid, assistance, and cooperation under any federal or state legislation now or hereafter enacted. Any evidence of indebtedness issued under this section shall constitute a negotiable instrument.