(a) The Board may establish and provide for a sinking fund for the retirement of bond issue or other debt or to provide security for the payment thereof.
(b) When so established, the sinking fund shall be kept intact and separate from other monies at the disposal of the Authority and shall be accounted for as a pledged asset for the purpose of retiring or securing such obligations.
(c) The cost of payments to any sinking fund shall be included in the annual budget of the Authority.