 For example, city land owned by the imperial government was returned to the cities, city council members were compelled to resume civic authority, often against their will, and the tribute in gold by the cities called the "aurum coronarium" was made voluntary rather than a compulsory tax.Additionally, arrears of land taxes were cancelled.This was a key reform reducing the power of corrupt imperial officials, as the unpaid taxes on land were often hard to calculate or higher than the value of the land itself.