Sin-bins and blue cards in soccer – what do we know?

Soccer’s lawmakers are set to unveil how trials for sin-bins and other measures to improve player behaviour will work later on Friday.

Here's a closer look at the proposals.

The International Football Association Board (IFAB) is set to publish protocols later on Friday in an effort to improve participant behaviour, including trials for a sin-bin.

Sin-bins have been trialled successfully at grassroots level and are now set to be tested higher up the chain.

However, during the initial trial phase, top-level competitions will not be involved. This is to avoid confusion among players – for instance, if their domestic league ran a trial but a continental competition they were involved in at the same time did not. It is not precisely clear what level the new protocols will be stress-tested at initially.

It is understood referees will use blue cards to indicate a player must go to the sin-bin.

Sin-bins will be used for two specific offences – dissent and tactical fouls.

Players will be ordered to go to the technical area for 10 minutes. If a player has already been booked, a blue card will mean they are sent off. Two blue cards will also result in dismissal.

The introduction of sin-bins and blue cards, should it reach the top level, would be one of the biggest developments in discipline in the game’s history, following on from the introduction of red and yellow cards at the 1970 World Cup in Mexico.

As well as sin-bins, competitions will have the option to trial ‘captain only zones’.

These are to be used by referees when they feel threatened or intimidated and mean that once the zone has been created, only team captains should enter.

A further trial is understood to centre on ‘cooling-off’ periods, where a referee sends teams