# Doctrine of Ultra Vires
## Core Concept
The term ultra vires means beyond the powers. Any act done by a company that is beyond its objects clause in the Memorandum of Association (MOA) is void and cannot be ratified — even by a unanimous vote of all shareholders.
## Why This Doctrine Exists
- The MOA's object clause defines the scope of the company's powers.
- Outsiders dealing with the company are presumed to know its objects (linked to [[doctrine-of-constructive-notice]]).
- Protects shareholders and creditors from the company's funds being diverted to unauthorised purposes.
## Key Rules
| Rule | Effect |
|---|---|
| Act within objects | Valid and binding |
| Act beyond objects (ultra vires) | Void ab initio — cannot be ratified |
| Act ultra vires the directors but intra vires the company | Can be ratified by shareholders |
## Interpretation Principle
Words in the object clause are read in connection with the company's main business. Wide, general terms (like 'general contractors') must be construed in light of the surrounding specific objects — they cannot be stretched to authorise unrelated activities.