The government has been prompted to step in just days after it announced unbundling of these services following reports that some airlines were charging for a very large number of seats, with one of them even imposing fees for the 'congested' middle seat, official sources said.
They said the Civil Aviation Ministry was now looking at framing rules to cap the number of preferential seats the carriers can offer in a flight.
In 2010-11, when some Indian carriers had started pre- booking seats, the Directorate General of Civil Aviation (DGCA) had stepped in and issued a directive asking them to withdraw the charges ranging from Rs 50 to 400.
DGCA had in July 2011 asked all airlines "to withdraw such charges with immediate effect under intimation to this office. ... Any mention about the same on the website may also be deleted on an immediate basis."
They also favoured a cap on the number of preferential seats an airline can offer in a flight and said the aviation regulator could consider framing regulations on the matter in line with prevalent international norms.