A bill that would make it illegal to wear a mask during a violent demonstration is nearing its final hurdle in the House of Commons, with just two hours of debate left.

Bill C-309 would make it a crime for people rioting or at an unlawful protest to conceal their identities. It's already illegal to wear a disguise when committing an indictable, or more serious, offence, which includes rioting. Unlawful protests, however, don't fall under that law because they're classified as a summary conviction, or less serious, offence.

An unlawful assembly is a gathering that causes fear. It's up to city officials to decide what constitutes a riot.

Last May, MPs on the House justice committee increased the penalty in the bill to 10 years for rioters who conceal their faces and five years for those at an unlawful protest. The maximum sentence for rioting is two years.

The committee sent the bill back to the House last May. Debate will resume Tuesday evening for an hour. MPs must vote on the changed bill before it can go on to the Senate to be studied in the Upper Chamber.

The second hour of debate is likely to be sometime in the next week, with a final vote at third reading expected at the end of October.

Blake Richards, the MP behind the bill, says he wanted to give police another tool to prosecute rioters and he was told the existing law was difficult to apply.

Earlier this year, the City of Montreal passed a bylaw to ban masks during protests. The move came amid massive student protests in Quebec over the then government's plan to allow universities to raise tuition fees.

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  • Stanley Cup Vancouver Scene Hockey

    Rioters burn police cars after the Vancouver Canucks were defeated by the Boston Bruins in the NHL's Stanley Cup Final in Vancouver, British Columbia, on Wednesday June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press - Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Riot police look on as two police cars burn during a riot in downtown Vancouver, British Columbia Wednesday, June 15, 2011 following the Vancouver Canucks 4-0 loss to the Boston Bruins in game 7 of the Stanley Cup hockey final. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press - Geoff Howe)

  • Stanley Cup Vancouver Scene Hockey

    Revelers retreat as a police flash bang goes off following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Police officers contain rioters following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    A car burns behind a police officer following a riot that broke out after the Vancouver Canucks were defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, on Wednesday June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press - Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    A police car burns during a riot in downtown Vancouver, British Columbia Wednesday, June 15, 2011 following the Vancouver Canucks 4-0 loss to the Boston Bruins in game 7 of the Stanley Cup hockey final. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Jonathan Hayward)

  • Stanley Cup Vancouver Scene Hockey

    Vancouver Canucks hockey fans take part in a riot in downtown Vancouver, British Columbia Wednesday, June 15, 2011 following the Vancouver Canucks 4-0 loss to the Boston Bruins in game 7 of the Stanley Cup hockey final. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP PhotoThe Canadian Press - )Ryan Remiorz

  • Stanley Cup Vancouver Scene Hockey

    A burnt out car lies upside down in the street following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Geoff Howe)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Riot police walk in front of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: A person with a Candanian flag walks in front of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Elsa/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: People run out of a Hudson Bay Co store with merchandise on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: A person walks in front of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Elsa/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Police on horseback ride through the street past a fire on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Police on horseback ride through the street past a fire on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Riot police stand in formation on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Elsa/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Police clash with rioters on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: People take pictures of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Riot police walk in the street as a couple kiss on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: A person walks in front of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Rich Lam/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Riot police stand in front of two burning police cars as people look on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Elsa/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: People pose in front of a burning vehicle on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Bruce Bennett/Getty Images)

  • Riot Breaks Out After Game In Vancouver

    VANCOUVER, BC - JUNE 15: Rioters try to flip a car on June 15, 2011 in Vancouver, Canada. Vancouver broke out in riots after their hockey team the Vancouver Canucks lost in Game Seven of the Stanley Cup Finals. (Photo by Bruce Bennett/Getty Images)

  • Stanley Cup Vancouver Scene Hockey

    Police officers walk amongst debris after a riot broke out following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    A car burns amidst a crowd following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Smoke plumes rise from police cars set on fire following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Police officers stand amongst debris after rioters moved through the area following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    A police officer walks amid debris following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Police officers stand together after rioters burned police cars following the Vancouver Canucks being defeated by the Boston Bruins in the NHL Stanley Cup Final in Vancouver, British Columbia, Wednesday, June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Police officers hold back the crowd after rioters burned police cars following the Vancouver Canucks being defeated by the Boston Bruins in the NHL's Stanley Cup Final in Vancouver, British Columbia Wednesday June 15, 2011. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press - Darryl Dyck)

  • Stanley Cup Vancouver Scene Hockey

    Vancouver Canucks fans watch as two police cars burn during a riot in downtown Vancouver, British Columbia Wednesday, June 15, 2011 following the Vancouver Canucks 4-0 loss to the Boston Bruins in game 7 of the Stanley Cup hockey final. Angry, drunken revelers ran wild Wednesday night after the Vancouver Canucks' 4-0 loss to Boston in Game 7 of the Stanley Cup finals, setting cars and garbage cans ablaze, smashing windows, showering giant TV screens with beer bottles and dancing atop overturned vehicles. (AP Photo/The Canadian Press, Jonathan Hayward)