Texas Government Code - GOV'T § 1471.056. Imposition of Assessment

(1) issue refunding bonds or certificates of assessment to pay all or part of the district's bonded indebtedness;  and

(2) impose the assessments as special assessments on the property in the district.

(1) shall specify the method of payment and rate of interest of the assessments;  and

(2) may provide for payment in periodic installments in amounts necessary to pay the principal of and interest on the refunding bonds or certificates of assessment as accrued.