If any part of the principal or interest of bonds or refunding bonds is unpaid after enforcement of the assessment securing such bonds, the board of supervisors shall order an additional or supplemental assessment to be made as provided in Section 51300, sufficient to pay the unpaid principal and interest.
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.