Sin bin trials featuring blue cards will be the subject of further discussion by the game’s lawmakers on Friday and Saturday.

The sin bin protocols, which would involve players being dismissed for 10 minutes for dissent and tactical fouls, had been signed off by the directors of the International Football Association Board (IFAB) and were ready for publication on February 9, at which point competitions would have been able to apply to conduct a trial.

However, the plug was pulled on publication that morning following media reports about blue cards the previous day.

FIFA issued a statement on the evening of February 8 saying the reports concerning a blue card at elite levels of football were “incorrect and premature”.

“Any such trials, if implemented, should be limited to testing in a responsible manner at lower levels, a position that FIFA intends to reiterate when this agenda item is discussed at the IFAB AGM on March 2,” the statement concluded.

Sin bins have already been tested successfully in grassroots and youth football, but the PA news agency understands the intention of the protocols which were pulled at the last minute had been to test them at much higher levels, with the only exception being senior national team competitions and the highest domestic league in any country, where a team had the ability to qualify for a continental competition.

The idea had been that the protocols could be introduced to the very top level once refined. All players on the pitch, including goalkeepers, could be sent to the sin bin under the original protocol, PA understands, but substitutes and coaching staff could not be.

Fouls such as the cynical tug by Italy defender Giorgio Chiellini on England’s Bukayo Saka in the Euro 2020 final was set to be a sin bin offence within one of the protocols, PA understands.

FIFA’s statement last month contrasted with comments from the chairman of its referees committee Pierluigi Collina at the IFAB annual business meeting last November.

The Italian said at the time: “The trial was very successful in a grassroots competition. Now we are talking of a higher level, very probably professional or even high professional football.

“We need to draft something that works or is worthy for top football.”

The Football Association, one of the five bodies which makes up the IFAB, was understood to have been interested in running a trial in the men’s and women’s FA Cups in the future.

It is not clear whether the sin bin trial protocols will be published in the same format planned on February 9 following Saturday’s annual general meeting at Loch Lomond, but pitched at lower-level competitions than originally intended, or whether the protocols themselves will be reworked and publication delayed beyond this weekend.

A first meeting is due to take place on Friday evening ahead of the AGM itself on Saturday morning.

The introduction of sin bin trials and the blue card at any level of the professional game would mark the biggest single shift in player discipline since the introduction of red and yellow cards for the 1970 World Cup in Mexico.

The IFAB had also been poised to publish details of a trial which gave referees the option of creating a ‘captain-only zone’ around them when they felt threatened or intimidated, and one giving the referee the option to send teams to a cooling-off area in the event of mass confrontations.

All of these had the intention of improving player behaviour, something FIFA president Gianni Infantino has said is essential to set the right example to young players and ensure people still feel safe, and encouraged, to be referees.

Another trial that had been set for publication on February 9 concerned how long goalkeepers can handle the ball, and how play should restart when they hold on too long.

Currently keepers can hold on for six seconds and anything over that is supposed to be penalised with an indirect free-kick, but lawmakers are concerned this is not being properly enforced.

The management of head injuries is also on the AGM agenda.

The World Leagues Forum and world players’ union FIFPRO have again written to the IFAB asking for permission to trial temporary concussion substitutes, something which was again rejected at last year’s AGM in London.

The player union and domestic league in Scotland, this year’s host nation, are among those seeking the right to conduct such a trial.

“From our perspective, we have a responsibility to those former players who are sadly living with dementia,” PFA Scotland chief executive Fraser Wishart said.

“But we also have to take responsibility as a game – whether it’s the unions, leagues, the government bodies – for current players and future players, to minimise the chances, as much as we possibly can, of players getting dementia. We’re involved in this initiative because we do feel that temporary concussion subs are the next step forward.”

Trials of permanent concussion substitutes were first approved by the IFAB in December 2020.