Except as otherwise provided under subsection (d) of Section 17-6.1, whenever any proposition to authorize or to levy an annual tax, or to increase the annual rate of tax levied by any school district, for any school purpose is submitted to the voters of such district at any election, each required notice or other publication of the election or referendum and the form of ballot shall contain, in addition to any other matters required by law:
(a) the geographic or other common name of the school district by which that district is commonly known and referred to, as well as the number of the district;(b) the maximum rate at which such tax may be levied if the proposition is approved;(c) the total dollar amount of the most recently approved annual budget of the school district, what the total dollar amount of that annual budget would be if increased by the amount of additional tax which may be levied if the proposition is approved, and what would be the percentage of increase in the total dollar amount of the most recently approved annual budget of the school district if such total dollar amount were increased by the amount of additional tax which may be levied if the proposition is approved; and(d) if the proposition is to increase the annual rate of an existing tax levied by the school district, then in addition to the matters set forth in (a), (b) and (c) above, the annual rate at which such existing tax currently is levied and the percentage of increase between the maximum rate at which such tax may be levied if the proposition is approved and the annual rate at which such tax currently is levied.