Airport Economic Regulatory Authority (AERA) had, in a consultation paper circulated to all stakeholders in late January, proposed slashing of charges for landing, parking and other support services at Delhi Airport by a massive 78 per cent for the second five-year tariff fixation period (April 2014-March 31, 2019).
AERA had asked the various stakeholders to submit their comments on the proposed reduction by April 10.
The proposal, if implemented, would adversely impact several ongoing airport projects of the AAI, they added.
DIAL (Delhi International Airport Ltd), the joint venture between AAI and a GMR Group-led consortium, runs the Delhi Airport. GMR holds 54 per cent stake while AAI owns a 26 per cent share.
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The Malaysia Airports Holdings Berhad (MAHB) and Frapport of Germany each hold 10 per cent.
As per the Operations, Management and Development agreement (OMDA) for Delhi Airport, AAI gets 46 per cent of the revenue.
Alleging that the tariff regulator was not "consistently following" the policy to calculate the Aggregate Revenue Requirement (ARR) of the project for the second control period, AAI has already taken up the issue with the Civil Aviation Ministry and requested it to intervene and ensure that the PPP project remains viable, sources said.
Following the last revenue projections, AERA had allowed DIAL to hike charges by 346 per cent, effective May 15, 2012, as against a 775 per cent increase proposed by the joint venture at the time.