§ 82.00 Twenty day period of limitation. After the publication of a
resolution, summary of such resolution or certificate together with such
a notice, the validity of the obligations authorized thereby may be
contested only if:

1. Such obligations were authorized for an object or purpose for which
the municipality, school district or district corporation is not
authorized to expend money, or

2. The provisions of law which should have been complied with at the
date of the publication of such resolution, summary of such resolution
or certificate were not substantially complied with, and an action, suit
or proceeding contesting such validity is commenced within twenty days
after such publication, or

3. Such obligations were authorized in violation of the provisions of
the constitution.