Upon such summons, the defendant may answer within the time specified therein, denying the judgment, or setting up any defense which may have arisen subsequently; or he may deny his liability on the obligation upon which the judgment was recovered, by reason of any defense existing at the commencement of the action.
The legislature occasionally skips outline levels.
(3) A person may apply [...]
(4)(a) A person petitioning for relief [...]
In this example, (3), (4),
and (4)(a) are all outline levels, but
omitted by its authors. It's only implied. This presents an
interesting challenge when laying out the text. We've
decided to display a blank section with this note, in order
to aide readability.