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In the backstroke, swimmers must start from within the water, facing the end of the pool, holding the starting grips.

Swimmers must touch the wall while lying on their back. The touch can involve any part of the swimmer's body.

An individual medley race consists of a sequence of butterfly, backstroke, breaststroke, and freestyle, in that order.

The Chief Timekeeper assigns positions to timekeepers, collects the timing sheets, and in the event of electronic timing failure, determines the official times.

The end of the race is signaled when a swimmer touches the wall at the end of the requisite number of laps for that particular race.

As per the FINA standards, the minimum depth for pools used in Olympic Games and World Championships must be at least 2 meters throughout the entire course.

Swimwear must not be constructed with any material that could aid in buoyancy, speed, or endurance. It must have a textile material and adhere to FINA guidelines.

According to FINA rules, the pool water temperature must be between 25°C (77°F) and 28°C (82.4°F).

The swimmer on the block can start their swim as soon as the incoming teammate touches the wall, but they must not leave the block before this touch.

An Olympic size pool must be 50 meters long, at least 25 meters wide, and have a depth of at least 2 meters.

If a swimmer's swimwear tears or becomes transparent, the race continues, and the swimmer can choose to keep swimming or stop.

Swimmers are not allowed to wear any footwear during a race, including, but not limited to, swim fins or footgear that adds propulsion.

In competitive swimming, a swimmer is disqualified after one false start.

In breaststroke and butterfly, turns and finishes must be made with both hands touching the wall simultaneously.

Only one single butterfly (dolphin) kick is allowed during the first arm pull in the breaststroke pullout.

Swimmers may stay underwater for no more than 15 meters after the start and each turn. Beyond this point, the swimmer's head must break the surface.

Goggles are allowed but must not be used to gain an unfair advantage, such as enhancing vision underwater beyond natural limits.

Swim caps must be made of latex or silicone and cannot cover the neck, ears, or extend past the shoulder.

FINA reviews and has the authority to update the rules of swimming every four years, during the FINA Technical Congress.

There is no specific stroke technique required for freestyle, but swimmers must touch the wall at each turn and at the finish of the race.

A standard swimming event requires a referee, starter, judges of stroke, turns judges, finish judges, timekeepers, and swimmers' clerks.

In butterfly stroke, both arms must be brought forward over the water and pulled back simultaneously.

Wearing jewelry is not recommended during a race because it can affect the swimmer's speed and safety but is not specifically prohibited by FINA rules.

During backstroke turns, swimmers must touch the wall while on the back before performing the turn, after which they may rotate to the breast and initiate a single or continuous turning action.