(CNN) — "Now if you could please step on the scale, we need to check your weight."
A common request at your doctor's office, sure.
But at the airport?
It's about to become standard procedure for anyone flying with Uzbekistan Airways.
In a recent statement, the country's flag carrier announced it will weigh passengers and their carry-on luggage prior to flights to determine how much weight they'll be adding to the plane.
"According to the rules of International Air Transport Association, airlines are obliged to carry out the regular procedures of preflight control passengers weighing with hand baggage to observe requirements for ensuring flight safety," says the airline's statement.
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An IATA spokesperson, however, tells CNN the organization isn't aware of any such regulation.
"We are not aware of an IATA rule concerning the weighing of passengers and their hand luggage prior to flight," says Chris Goater, manager of IATA corporate communications, via email.
"All airlines have policies in place for load calculations, weight and balance of their aircraft. These policies in turn are subject to the rules and regulations of their national aviation regulator."
Uzbekistan Airlines says passengers will be weighed on scales in airport departure zones.
"The weighing record will only contain the corresponding passenger category (i.e. male/female/children). As for the rest, the full confidentiality of results is guaranteed."
How commercial airliners measure weight/mass
Aviation bodies like the U.S. Federal Aviation Administration (FAA) and the European Aviation Safety Agency have issued formulas for airlines to calculate the average weight passengers are adding to a plane.
Most commonly, that involves applying an average passenger-mass value.
For instance, the latest FAA guidelines on aircraft weight and balance control set individual passenger weight averages at 190-195 pounds for adults and 82 pounds for kids, depending on whether it's summer or winter. (Based on the assumption people wear heavier clothing in winter.)
These figures also include a 16-pound allowance for personal items and carry-on bags.
Uzbekistan Airways hasn't responded to CNN's request for clarification on the new guidelines and whether overweight passengers will be penalized.
Should it make the controversial move to charge fliers extra, it wouldn't be the first time.
In 2012, Samoa Air made global headlines by introducing a pay-as-you-weigh fare structure, which is still in place today.
Few things lately seem to be as prolific as airline fees. It seems even the most generous carriers are done absorbing the costs of things like printing out boarding passes or supplying meals. American carrier JetBlue was one of the last remaining airlines that didn't charge customers for checked bags, but even they changed their tune recently.
Joe Brancantelli, a travel journalist who runs the travel website JoeSentMe
, says the trend is unlikely to end anytime soon.
"I think it comes down to this: Airline executives are convinced you pay too little for transport from point A to point B. So they lard their fare with all sorts of extra fees," he says.
Not sure what you're paying for? Consider this your airline fee cheat sheet.TSA fees
One fee that irks travelers and carriers alike is the U.S.-government imposed TSA security fee. The fees started post-9/11, and were a moderate $2.50 per journey leg. Last year, the fee more than doubled, less for increased security measures and more as a means of battling the U.S. federal deficit.
"Carriers were not happy about this last year," recalls Alexandria Williams, spokeswoman for FareCompare
, with many industry groups, including Airlines for America and the International Air Transport Association, kicking back. Some hoped the airlines might absorb the fees, but for the most part, these have been passed on back to the passenger.
"The next step is for the industry to make those sort of changes and recognize that, 'Hey, we are not all 72 kilograms [about 160 pounds] anymore and we don't all fit into a standard seat,'" Chris Langton, Samoa Air chief executive told CNN in 2013.
"What makes airplanes work is weight. We are not selling seats, we are selling weight."
The airline's motto?
"A kilo is a kilo is a kilo!"