(a) The secretary of the board shall serve as tax assessor for a district levying taxes on the benefit basis.
(b) When a tax is levied, the secretary shall, at the expense of the district, prepare a tax roll substantially in the same form as the assessment roll made by county assessor and collector, except the roll shall state net benefits assessed against property.

(c) The secretary shall compute the amount of taxes assessed against each piece of property and enter the amount on the tax roll and shall file with the assessor and collector of each county in which a portion of the district is located a certified copy of the part of the tax roll which relates to property in the district located in that county.