All players on a team must wear shirts that match in colour and pattern (sleeve lengths may vary).

Each player in a team for a particular game must be designated by a unique integer between 0 and 99 inclusive.

The shirt that a player wears in that game must bear their number, expressed only in Arabic numerals, with an optional leading zero for numbers between 0 and 9 inclusive.

The number must be sewn or printed onto the back of the shirt. Each digit in the number must be a minimum of sixteen (16) centimetres high and have a minimum line width of three (3) centimetres wide.

The numbers must be clearly visible from a distance, entirely one colour, and of a significantly different colour from the background shirt colours.

There must not be any overlaid design or characters obscuring the numbers.