The board of park commissioners of any park district may issue bonds pursuant to R.C. Chapter 133 for the purpose of acquiring and improving lands as authorized by R.C. § 1545.11. The board may secure the payment of such bonds by pledge or deed of trust of any of its revenues and receipts resulting from rentals, concessions, licenses, and permits. The board shall not pledge the credit or taxing power of the district for the payment of any such bonds, nor shall any of the bonds issued under this section be deemed to be an indebtedness of the district.