Difference between Ultra Vires and Estoppel

ULTRA VIRES vs ESTOPPEL: NOUN

A legal principle in the law of equity that prevents a party from asserting otherwise valid legal rights against another party because conduct by the first party, or circumstances to which the first party has knowingly contributed, make it unjust for those rights to be asserted.
The agency by which the law excludes evidence to dispute certain admissions, which the policy of the law treats as indisputable.
A stop; an obstruction or bar to one's alleging or denying a fact contrary to his own previous action, allegation, or denial; an admission, by words or conduct, which induces another to purchase rights, against which the party making such admission can not take a position inconsistent with the admission.
In law, the stopping of a person by the law from asserting a fact or claim, irrespective of its truth, by reason of a previous representation, act, or adjudication inconsistent therewith.
Stoppage; impediment.
A bar that prevents a person from presenting evidence contradicting a certain established fact.
A rule of evidence whereby a person is barred from denying the truth of a fact that has already been settled

Beyond power; transcending authority; -- a phrase used frequently in relation to acts or enactments by corporations in excess of their chartered or statutory rights.
Beyond one's power; specifically, beyond the legal or constitutional power of a person, court, or corporation.

Null, Contravened, Justiciable, Mala fide, Nullity, Lawful, Prohibitory, Unlawful, Unenforceable, Inapplicable, Statutory, Unconstitutional, Contravention, Violative, Intra vires

Contributory negligence, Subrogation, Nonsuit, Preclusion, Setoff, Patentee, Privity, Laches, Judicata, Closure, Impediment, Foreclosure, Forfeiture, Inadmissible, Inadmissibility

Null, Contravened, Justiciable, Mala fide, Nullity, Lawful, Prohibitory, Unlawful, Unenforceable, Inapplicable, Statutory, Unconstitutional, Contravention, Violative, Intra vires

Counterclaim, Tortfeasor, Contributory negligence, Subrogation, Nonsuit, Preclusion, Setoff, Patentee, Privity, Laches, Judicata, Closure, Foreclosure, Forfeiture, Inadmissible

Remedios para evitar la responsabilidad ultra vires hereditatis.
Circular being declared ultra vires, void and invalid.
This became known as the ultra vires doctrine.
Ultra vires unavailable to invalidate transfers of property.
It is simply because we are ultra vires.
And this was ultra vires the federal government.
Ultra vires contract: A contract of a corporation which is ultra vires is void ab initio and of no legal effect.
How can it be ultra vires if it has no vires to be ultra?
All, including adjudicators, QCAT, BCC solicitors and counsel, real estate agent and employee heaped ultra vires incompetence upon ultra vires incompetence.
Companies Act, Memorandurn Association, and Ultra vires the Articles act done contrary to in scope of ultra vires Act.

It is appropriate to commence by noticing the distinction between cause of action estoppel and issue estoppel.
This additional requirement demonstrates a potential confusion between promissory estoppel and the doctrine of equitable estoppel.
Detrimental reliance is an essential ingredient of estoppel, without which there can be no estoppel.
Is it true that estoppel by convention has the same effect as promissory estoppel?
Issue preclusion includes the concepts of direct estoppel and collateral estoppel.
For estoppel in contract law, see promissory estoppel.
We itself raise estoppel whereas estoppel requires a representation.
Equitable Estoppel Unites Proprietary and Promissory Estoppels This ratio established a new doctrine of equitable estoppel which subsumed both proprietary and promissory estoppel.
The estoppel here relied upon is known as an equitable estoppel, or estoppel in pais.
West End Commercial concerns two types of estoppel: promissory estoppel and proprietary estoppel.