0 not allowed by the constitution (= set of rules for government) of a country or organization:
Changing the law in this way would be unconstitutional.
1 not allowed by the constitution (= set of political principles) of a country or organization
One function of legal rules is to create the legal positions that citizens hold and, perhaps, challenge as unconstitutional.
Democracies may experience typically more constitutional government transfers than dictatorships, and dictatorships may have more unconstitutional government changes than democracies.
They agreed that the ordinance is unconstitutional, but because it is over-broad.
However, those problems only create justiciable controversies when they have an unconstitutional impact on somebody.
Indeed, in large numbers of cases in which self-defensive deadly force is justified, capital punishment would be unconstitutional.
And if the appellate court, in turn, neglected to invalidate the law, an even higher court would intercede to invalidate the unconstitutional act.
The new justices have also ruled that compulsory affiliation to chambers of commerce and industry is unconstitutional.
Optionality means that legislators can legitimately switch back and forth between valid rules, at least if the legislators lack an unconstitutional purpose in doing so.