When they are issued, the bonds are [current / noncurrent] liabilities.

However, as time passes and the due date becomes less than 1 year, a bond becomes a [current / noncurrent] liability. In 2011, a bond that is due on January 1, 2013, would be a [current / noncurrent] liability. In 2012, the same bond would be a [current / noncurrent] liability.