(1) When the written estimate of the amount of money required has been delivered to the board of county commissioners, the board shall give notice of its intention to levy and collect a tax sufficient for the payment of bond obligations and other expenses.
(2) The notice must be given:
(a) by posting in five public places within the county and within the boundaries of the lands upon which the tax is to be levied;
(b) by publishing a copy of the notice as provided in 7-1-2121; and
(c) by forwarding, by mail as provided in 7-1-2122 at least 10 days prior to the hearing provided for in 7-13-2306 (4), a copy of the notice addressed to the owners and the purchasers under contracts for deed of taxable real property within the district as shown by the current property tax record maintained by the department of revenue for the county or counties the boundaries of which include taxable real property of the district.