"I hereby certify that I have examined the proceedings prior and relative to the voting of the special tax, the resolutions, ordinances and other proceedings of ............. pursuant to which the series of bonds of which this is one was issued; that the said proceedings are regular in form; and that the proceeds of the special tax dedicated to the payment of same, estimated upon the tax roll of the .......... of ............ last made and filed prior to the election authorizing the special tax, that is to say, for the year 19..., will be ample for the payment of said bonds, principal and interest.
This the ............. day of ......... 19..
.................................
District Attorney.
.................................
Judicial District."
La. R.S. § 38:502