Final answer:
A referendum is a process allowing voters to nullify a property tax increase exceeding a preset limit, like the 8 percent mentioned in the question.
Step-by-step explanation:
The term you are looking for is referendum. A referendum is a process by which local voters have the power to nullify a property tax increase that exceeds a certain percentage, in this case, 8 percent. This process allows voters to approve or reject legislation or tax increases proposed by their government. If a given tax increase proposal is placed on the ballot, and more voters reject it than approve it, the tax increase does not take effect.