It seems the state has been overlooking a fundamental restriction already in place when certifying election results for 5+ year millages and Bond requests.  Has there been a validation for electors established to determine if the right to vote on certain issues?

Typically, those who show up for an election for a millage are unchallenged as to their ability to vote on such issues.  There are no instructions that stipulate the law, as established by the constitution REQUIRES a real stake in such issues printed on the election forms (ballots), and there are no alternate means to prevent abrogation of constitutional statute.  The Michigan Constitution is very clear:

ARTICLE II
Elections

§ 6 Voters on tax limit increases or bond issues.

Sec. 6. Whenever any question is required to be submitted by a political subdivision to the electors for the increase of the ad valorem tax rate limitation imposed by Section 6 of Article IXfor a period of more than five years, or for the issue of bonds,  only electors in, and who have property assessed for any ad valorem taxes in, any part of the district or territory to be affected by the result of such election or electors who are the lawful husbands or wives of such persons shall be entitled to vote thereon. All electors in the district or territory affected may vote on all other questions.

History: Const. 1963, Art. II, §6, Eff. Jan. 1, 1964.
Former Constitution: See Const. 1908, Art. III, §4.

A question we should be asking might be: "Is a passed millage request subject to legal challenge based on the inability to verify the legal status of the electors voting on such issues?" In other words, if you don't own property you cannot vote on a bond issue, so is your ballot restricted, or not?