Ind. Code § 8-15-2-13
(c) Any such trust agreement or any resolution providing for the issuance of such bonds may contain such provisions for protecting and enforcing the rights and remedies of the bondholders as may be reasonable and proper and not in violation of law, including covenants setting forth the duties of the authority in relation to:
(f) All expenses incurred in carrying out the provisions of any such trust agreement may be treated as a part of the cost of the operation of the toll road project or projects.
Formerly: Acts 1951, c.281, s.13; Acts 1971, P.L.99, SEC.3. As amended by Acts 1980, P.L.74, SECS.239, 240; P.L.109-1983, SEC.17.