PR1 M1x (previously AS M1x and earlier AM1x) is a Paralympic rowing classification.
[3] In 2008, BBC Sport defined this classification was "AM1x: A fixed-seat single scull boat for men.
"[4] Classification is handled by FISA – International Rowing Federation.
This policy was put into place in 2014, with the goal of avoiding last minute changes in classes that would negatively impact athlete training preparations.
All competitors needed to be internationally classified with their classification status confirmed prior to the Games, with exceptions to this policy being dealt with on a case by case basis.