Agents associations in Scandinavia, are to meet with EC commissioner on competition law over the decision by the International Air Transport Association (IATA) to demand BSP payments on a weekly basis.
The meeting will take place in Brussels on January 24 with ECTAA, the European agents' association, also expected to attend.
The Norwegian Travel Trade Association, Denmark's DRF and Sweden's SRF are also seeing anti-competition authorities in their own countries over the IATA decision.
The three associations will also investigate whether any action can be taken against thre airline body under contract law.
The moves come after IATA's airline members voted at its Special Passenger Agency Conference in Singapore earlier this month for weekly BSP payments in Scandinavia.
The airlines voted to shorten the payment period from monthly to weekly by 2010 despite strong opposition from the agents.
Mr Rolf Forsdahl, director of the Norwegian association, said: "We shall look into all the possibilities from different legal angles and then put the different scenarios to our members.
"We shall also be looking at it from a contractual point of view and see if we need some specific legal expertise to help us."
Mr Forsdahl said the three associations would do all they could to stop the change to weekly payments going through.
"We have got the support of ECTAA which is concerned about the principle.
"If we let this go through, IATA will make more unilateral decisions which will hurt agents.
"We are not going to let this matter drop."
Mr Lars Thykier, managing director of the DRF, said a complaint to the EC was the likeliest first move.
He confirmed that the three associations would seek legal advice over the issue of contract law as it was not clear that the arrangements on BSP payments with IATA constituted a contract.
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