Tata Sons’ board voted on September 17 to reappoint N Chandrasekaran as Chairman for another five years. Tata Trusts, which owns most of the company, says the vote could not validly do so. Neither accepts that the other has settled the matter.

The Trusts say Tata Sons’ articles require support from a majority of Trust-nominated directors for a chairman’s appointment.Noel Tata voted against the resolution; nominee Venu Srinivasan voted for it. The Trusts say that split falls short, but the board proceeded on its majority vote. Which view prevails cannot be settled by counting shares or hands.

What use is a governance arrangement if its participants cannot agree on what counts as a decision? Rules matter most when people disagree.

A majority shareholder does not automatically decide every board question. Nor can a board majority ignore an applicable condition in the company’s Articles of Association. The Trusts’ claim stands or falls on the appointment rule and whether it was satisfied, not on the assertion that owners must prevail. The board’s case needs the same precision.

Srinivasan’s vote reveals why precision is important. A Trust nominee might be expected to understand the shareholder’s wishes, but a company director also has to exercise judgement. Any protection giving the Trusts a decisive say must work even when a nominee disagrees. Otherwise, it is an expectation about a person, not an effective rule.

Succession has made the distinction urgent. Chandrasekaran said in August that he would not seek another term. The Trusts say the decision was accepted and a successor-selection process should follow. The board asked him to reconsider and voted to retain him. Speculation about motives will not explain how Tata Sons chooses a leader when its board and controlling shareholder disagree.

Keeping an experienced chairman can spare a company a difficult handover. But the Trusts could see succession as the expected course; directors accustomed to his leadership could see his departure as the disruption. That is why the appointment rule must do more work than the word “continuity”.

The listing question makes this more than a fight over one office. Tata Sons’ board has begun considering steps to comply with the RBI’s listing requirement, while the Trusts oppose a change they fear could alter the character of a group controlled by charitable trusts. Another consequential decision sits inside the same governance structure.

Tata Sons is not listed, so this dispute cannot be measured through a stock-exchange price reaction. Prospective investors, however, will need to know not only what it owns and earns, but who can commit it to a course of action when the board and Trusts part company.

Boards and shareholders are allowed to differ. The operating risk is delay in decisions on leadership, regulation and capital because each side disputes the other’s authority. The investment risk is that outsiders struggle to assess a company whose decision rights appear clear in calm periods but contested in difficult ones. Neither risk should be presented as a loss already suffered.

Tata Sons can test the concern rather than argue about it. Establish which appointment procedure applies and follow it. Put a successor-selection process in place that commands confidence despite disagreement over a name. Explain what the RBI requires, which listing steps have been authorised and what remains undecided. If those answers emerge, this may prove an unpleasant but contained dispute.

If they do not, the next hard decision will arrive before the argument over this one has ended. Tata Sons has long benefited from agreement among powerful people. It now has to show that its rules can do the job when agreement cannot.