European Leagues is an organisation that claims to represent the voice of 38 professional football leagues across 31 countries.

Austria will join Denmark, England, France, Israel, Northern Ireland, Norway, Portugal, Scotland, Sweden, Switzerland, and Turkey in granting permission for full crowds from Saturday (February 12).

Despite this, many of these countries have terms attached which spectators must follow.

When Austria’s stadiums open their doors to 100 per cent fan capacity, it will be mandatory for fans to wear masks while only those vaccinated or recovered from coronavirus may attend matches.

The latter restriction will change from February 19, where those who test negative for COVID-19 will be granted access.

France, Northern Ireland, Portugal, Scotland, Switzerland, and Turkey are also using their versions of COVID-19 passes, with Switzerland lifting this restriction on February 17.

Israel requires just mask wearing whilst Denmark, England, Norway, and Sweden have no restrictions.

Elsewhere, the most relaxed countries beyond this group are Spain, with 85 per cent crowds, and Belgium allowing 70 per cent capacity.

Belgium requires a COVID-19 pass and mask wearing, but prohibits drinking in the stands and visiting supporters attending.

Spain does not require a COVID-19 pass, but they promote mask wearing, ban eating and drinking, with the exception of water, and prohibit smoking in the stadium.

The Spanish regions and club can also request to impose greater restrictions if they wish - but currently they are all aligned with the general Government regulations.

Depending on the area, Russia is authorising capacities to be between 25 per cent, as sanctioned in the Rostov area, and 70 per cent, which is permitted in Moscow.

The Moscow region, however, is much lower due to the authorities allowing just 3,000 spectators into grounds - the Nizhny Novgorod region also operates at the same level.

The Tatarstan Republic, the Krasnodar region, the Tula region and the Urals region are allowed 30 per cent crowds whilst St. Petersburg, the Chechnya region, and Samara region are higher with 50 per cent.

Italy and Serbia have sanctioned 50 per cent of stadiums to be filled by fans, though the football and Government authorities in Italy are discussing increasing this number to 75 per cent from March 1.

The Italians also require medical-grade masks to be worn and a COVID-19 pass to be shown, contrasting to Serbia’s only rule of mask wearing.

Germany has granted permission to a maximum of 10,000 fans attending matches if this does not exceed 50 per cent of the stadium's capacity.

Fans are subject to local health regulations and protocols as well as a COVID-19 pass.

The Netherlands allows one third capacity with fans showing proof of the nation’s accepted COVID-19 pass and socially distanced by 1.5 metres.

Poland differs from each country by accepting capacities up to 30 per cent for those who are not vaccinated, recovered from COVID-19, or tested.

However, if the club sells more than 30 per cent of their capacity, these tickets will be only available for those who are vaccinated, recovered from COVID-19 or tested.

These rules will be in place until at least February 28.

Romania allows a capacity of 30 per cent if spectators show a COVID-19 pass.

Slovakia currently operates at 25 per cent of the stadium’s capacity, for those who are double vaccinated or have tested positive for the virus or have overcome it in the last 180 days.

Greece remains stricter in comparison as just 10 per cent of the total capacity can attend if the stadium is under 10,000 seats.

If the stadium capacity is over 10,000, a cap of 1,000 applies.

Fans must abide to the 1.5m social distancing rule, showing the nation’s accepted COVID-19 pass.

From February 29, Czech Republic will update its rule of 1,000 fans being allowed to attend without a COVID-19 pass, to 1,000 fans plus 50 per cent of the rest of the stadium.

Ukraine’s stadium crowd number depends on the nation’s epidemic danger level - areas in the green, yellow or orange zones allow no more than two thirds capacity whilst red zones accept no more than 260 people - including players, coaching staff, and officials.

Iceland’s rules include 500 spectators per section in the stadium alongside the requirements of wearing a mask and social distancing.

Finland, who currently allow 500 fans at the indoor events, remain confident outdoor events will have fans at the start of the season in April.

Lithuania applies the same rule of 500 fans for both indoor and outdoor events, with a further requirement of mask wearing.

Latvia has a maximum capacity of 500 with a COVID-19 pass, while Kazakhstan are currently in discussions for the 2022 season.