(a) The district may issue bonds, notes, or other obligations payable wholly or partly from ad valorem taxes, assessments, impact fees, revenue, contract payments, grants, or other district money for any purpose authorized by this chapter.
(b) Notwithstanding Subsection (a), ad valorem taxes may be pledged only to pay bonds, notes, or other obligations that are issued by the district for purposes authorized under §§ 52 and 52-a, Article III, or § 59, Article XVI, Texas Constitution.