The Italian government on Wednesday tackled hooliganism following the death of a policeman in rioting Friday - the first policeman to die in decades of stadium violence.
The bill being examined by the cabinet raises the maxium penalty for hooligan-related offences from three years to 15 years.
The previously announced measures, which tighten up a 2005 package that has never been fully applied, paved the way for the resumption of Serie A, which was suspended last weekend.
Fans will not be allowed into grounds that do not comply with security regulations.
The quick resumption pleased most clubs but some grumbled about lost revenues and threatened to let fans in anyway.
The clubs have also been arguing further delay would be tantamount to giving in to the troublemakers.
Italian club chairmen have also complained about the cost of upgrading stadiums that do not belong to them.
Most Italian grounds are owned by the local council.
Many Serie A stadiums do not comply with laws passed to improve security in 2005 after a previous wave of hooliganism.
The Italian Soccer Federation FIGC will present a list of up-to-scratch stadiums on Thursday morning.
Only four grounds are believed to fully comply with the law: Rome's Olympic Stadium - home to AS Roma and Lazio - Turin's Olympic Stadium, Palermo's Stadio Barbera and Siena's Stadio Artemio Franchi.
Roma is certain to enjoy home support as it tries to make up an 11-point gap on runaway Serie A leader Inter against Parma on Sunday.
Sampdoria, Cagliari, Empoli, Messina, Parma and Reggina should be able to play in front of their home crowds too, as their stadiums are within reach of meeting the required standards.
Ascoli, Atalanta, Catania, Chievo Verona and Udinese, on the other hand, look set to play behind closed doors as their grounds are far from satisfying the requirements.
These grounds have only been able to host games this season because local prefects issued extensions on deadlines to implement the 2005 anti-violence measures.
This means that Inter will not have travelling support when they face Chievo on Sunday.
But there will be a full house at the Olimpico for the last possible championship showdown on April 18, the date of the rescheduled Inter-Roma match that was supposed to have been played last Sunday.
Florence's Stadio Artemio Franchi, Livorno's Stadio Armando Picchi and Milan's San Siro Stadium - home to giants Inter and AC - will probably be open at reduced capacity. This is because sections of the ground that do not fit the bill will be closed.
Milan's prefect said Wednesday the San Siro would be opened to season-ticket holders, enabling AC Milan to avoid having to refund those tickets for Sunday's match against Livorno.
The 2005 law rules that stadiums must be equipped with video surveillance inside and outside the grounds and external lighting systems to help spot troublemakers.
The police must have a special section of the stadium where they can coordinate their activities.
It is also obligatory for stadiums to have turnstiles in order to prevent known hooligans and fans without tickets from sneaking in.
There should be a series of barriers and gates at a set distance where stewards and police can 'filter' the crowd to create a security cordon around the ground.
Tickets must feature the buyer's name and the seat in the ground where they must sit - again to make it easier to identify hooligans.
In additional measures, the government has banned block ticket sales to away fans, barred direct relations between clubs and fans groups, and extended by 12 hours the time fans can be arrested for hooliganism, from 36 to 48 hours.
Hooligans may also be forced to perform "socially useful" jobs on match days, including removing graffiti and swilling out stadium toilets.
FIGC Chief Luca Pancalli suspended Italian football after 38-year-old police officer Filippo Raciti was killed at the Catania-Palermo Sicilian derby, leaving a wife and two children.
His funeral was broadcast live on TV Monday. A large TV audience was moved by appeals from his widow and daughter.
A poll out Wednesday said a majority of Italians were in favour of stopping soccer for longer than a week.
Eighteen fans have been killed in and around grounds since 1963.
