There are three models to calculate charges at airports - single till, double till and hybrid till.
International Air Transport Association's regional vice president for Asia Pacific Conrad Clifford said the draft civil aviation policy stated that tariff at "all future airports" will be calculated on a hybrid till basis.
However, the final policy states that "future tariffs at all airports" will be calculated on a hybrid till basis.
"We will be approaching the civil aviation ministry to clarify the seemingly minor change in the wording, which has a major impact on the airport charges landscape in India," Clifford said.
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Even as he termed the final aviation policy a step in the "right direction", Clifford said, "We are concerned with the way the policy on hybrid till was written."
In the single-till model, both aeronautical and non- aeronautical charges are taken into account for fixing landing and parking charges. In the double-till model aeronautical charges are calculated taking into account revenues from aeronautical and non-aeronautical charges on the basis of collections from non-aeronautical.
According to IATA, this change will impact the basis for tariff determination for private airports in India, and also signal national airports operator AAI to switch from the single-till approach used currently, to the hybrid-till.
The government had proposed in the Draft Aviation Policy
that for the airports developed by state governments, private sector or in PPP mode "tariff at all future airports will be calculated on a hybrid till basis. 30 per cent of non- aeronautical revenue will be used to cross-subsidise aeronautical charges. In case the tariff in one particular year comes out to be excessive, the airport operator and regulator will explore ways to keep the tariff reasonable, and spread the excess amount over the future".
As per the policy, 30 per cent of non-aeronautical revenue would be used to cross-subsidise aeronautical charges.
"In case the tariff in one particular year or contractual period turns out to be excessive, the airport operator and regulator will explore ways to keep the tariff reasonable, and spread the excess amount over the future," the final policy stated.