; or (D) the laws or ordinances of any State or political subdivision of a State that permit or require a public employer to recognize a labor organization on the basis of signed authorizations executed by employees designating the labor organization as their representative. (4) Limited enforcement power In the case of a law described in subsection (d)(2), the Authority shall only exercise the powers provided in section 5 with respect to those categories of public employees for whom the State does not substantially provide the rights and responsibilities described in section 4(b). 9. Authorization of appropriations There are authorized to be appropriated such sums as may be necessary to carry out the provisions of this Act.