; fee A servicer appointed under paragraph (1) shall— (A) act as the agent for the Secretary; and (B) receive a servicing fee, subject to approval by the Secretary. (c) Assistance from experts The Secretary may retain the services, including counsel, of any organization or entity with expertise in the field of municipal and project finance to assist in the underwriting and servicing of Federal credit instruments provided under this Act. 10. State, tribal, and local permits The provision of financial assistance for a project under this Act shall not— (1) relieve any recipient of the assistance of any obligation to obtain any required State, local, or tribal permit or approval with respect to the project; (2) limit the right of any unit of State, local, or tribal government to approve or regulate any rate of return on private equity invested in the project; or (3) otherwise supersede any State, local, or tribal law (including any regulation) applicable to the construction or operation of the project. 11. Regulations The Secretary may promulgate such regulations as the Secretary determines to be appropriate to carry out this Act. 12. Funding (a) In general There is authorized to be appropriated to each of the Secretary and the Administrator to carry out this Act, to remain available until expended— (1) $20,000,000 for fiscal year 2018; (2) $25,000,000 for fiscal year 2019; (3) $35,000,000 for fiscal year 2020; (4) $45,000,000 for fiscal year 2021