(a) Illegal tax, charge or assessment. Injunctive relief may be granted to enjoin the illegal levy of any tax, charge or assessment, the collection thereof, or any proceeding to enforce the same.

(b) Unauthorized contracts. Injunctive relief may be granted to enjoin any public officer, board, or body from entering into any contract or doing any act not authorized by law that may result in the creation of an additional levy of a tax, charge or assessment.

(c) Joinder. Any number of persons whose property is or may be affected or whose taxes may be increased by the illegal acts mentioned in subsections (a) and (b) of this section may join in the petition for injunction.

(d) Bond. Where it is shown to the judge that continued procedure under the illegal acts may render the proceedings moot, the judge may, in his or her discretion grant a temporary injunction without bond being required.