WINNIPEG — Winnipeg's crusading professor has won yet another round in his legal battle against airline baggage rules.

The Canadian Transportation Agency released a decision Tuesday declaring Air Canada's international baggage liability rule unreasonable, and ordered that Air Canada replace it within 10 days.

Gabor Lukacs, 29, an assistant professor of mathematics at the University of Manitoba, had asked for a review of a policy which said Air Canada couldn't be held liable for valuables such as money and jewelry in passengers' checked baggage on certain itineraries.

The agency found it was unreasonable for Air Canada to have a blanket exclusion of liability.

Air Canada must now change its policy to permit exclusion of liability only in the exceptional circumstances described by an international treaty called the Montreal Convention, which sets uniform rules for international carriage of passengers, baggage and cargo.

Lukacs also won a legal fight against WestJet over compensation for lost or damaged luggage.

Earlier this year, the Federal Court of Appeal rejected WestJet's request for a hearing on the matter.

After Lukacs complained, the transportation agency ruled the airline's $250 limit for luggage compensation was too low, and ordered the cap raised to $1,800, which is the amount dictated by the Montreal Convention.