At the time the district issues bonds payable wholly or partly from ad valorem taxes, the board shall provide for the annual imposition of a continuing direct ad valorem tax, without limit as to rate or amount, while all or part of the bonds are outstanding as required and in the manner provided by Sections 54.601 (Tax Levy for Bonds) and 54.602 (Establishment of Tax Rate in Each Year), Water Code.Added by Acts 2015, 84th Leg., R.S., Ch. 495 (S.B. 2028), Sec. 1, eff. June 16, 2015.