No funds authorized to be appropriated under this chapter or any other Act of Congress shall be used by any person, firm, corporation, group, or organization at any time, directly or indirectly, to interfere with or impede the implementation of any provision of this chapter or any rule, regulation, or project thereunder, except that this limitation shall not apply to the provision of legal and related assistance in connection with any proceeding or action before any State or Federal agency or court. The President shall ensure that this paragraph is complied with by such order or other means as the President deems appropriate.