This archive photo from March 16, 2017 shows the interior of a commercial airliner at John F. Kennedy International Airport in New York. (Photo: Seth Wenig, AP)

It's official: the US government will soon regulate the distance between airline seats.

President Donald Trump on Friday signed a law passed by Congress that extends the FAA's five-year policy. The FAA's Reauthorization Bill includes several provisions that will affect air travelers.

One of the most attracted features is the "SEAT Act," which requires the FAA to set standards for the size of airline seats. The agency has a year to set minimum requirements in terms of width and space between the seats.

Many praised the bill for preventing airlines from further reducing the number of seats, but there is no guarantee that it will go as planned.

The FAA will need to develop regulations on the minimum size of seats on commercial flights. But we do not know what rules the agency could possibly adopt. It is possible that the FAA rules end up codifying the narrowest seating arrangements already proposed by US airlines.

Elsewhere, the FAA bill is also notable for what is not included.

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