The length of the pool is equal to 25 meters with a blunder of ± 5 centimeters. The act of acceptance of the pool must be signed by the chief judge of the competition, members of the technical committee and approved by the president or board members of IWSA.
Competitions must be held on open water, with a lack of water stream.
In case of presence of water flow, world records are registered on conditions of 25 meter race starts in upstream.
World records are registered in all age groups and all distances, sanctioned by the International Winter Swimming Association (IWSA).
World records must be registered with precision up to 0.01 sec.
Time, which is equal to the record time with precision up to 0.01 sec., is equivalent to the world record, and the competitor, who showed such a time, is called “part-owner of the world record”. If the newly registered record was set in a colder water category (i.e. first record was set in B, second in A, showing the same time), the competitor becomes the new record holder.
If a competitor, starting first in team relay swims, finishes in a record time for their age group according to international rules of completing this distance, then his result is registered as a world record, on conditions that the result is shown in the competition protocols.