text: The measures are outlined in the Digital Economy Bill, which was published on Tuesday.
  It says phone operators could be penalised if they miss coverage targets and other licence commitments made to the sector's regulator.
  And it sets out how a separate watchdog could punish adult sites that fail to check their visitors' ages.
  Other measures include:
  If the bill is passed, Ofcom would be able to fine mobile networks a maximum £20,000 a day, up to a total sum of £2m, if they fail to hit agreed service goals.
  The regulator has suggested this would give it "more flexibility in our important work to manage and ensure optimal use of spectrum".
  "At the moment, when a provider breaches its licence, in most cases our only sanction is to remove the licence completely, or launch criminal proceedings," a spokesman said.
  "The bill would allow Ofcom alternatively to impose financial penalties, which may in some cases be a more proportionate means of securing compliance."
  The law also proposes creating a separate age-verification regulator, which will be told to publish guidelines about how sites should ensure their users are aged 18 or older.
  It says this body should be able to fine pornographers up to £250,000 if they fail to comply.
  Details of how this would work in practice have still to be determined.
  But the bill states that the watchdog would be able to alert credit cards and other payment providers as well as other companies providing a service to the sites in cases where it cannot persuade their owners to comply.
  One detail not mentioned in the bill is that the new broadband universal service obligation (USO) should set 10Mbps as the minimum download speed.
  However, a factsheet issued by the Department for Culture, Media and Sport does refer to this as being its "ambition".
  "Ofcom has reported that 10Mbps is the speed needed for a USO, given a typical household's use of digital services, and is adequate for demanding services like streaming high definition video content," it says.
  "The speed will be specified in regulations to allow it to be updated when necessary.
  "Regulations can be updated in a much shorter timescale than a new bill, which can take a year before it can be brought into force."
  Assuming there are no major amendments to the bill, one industry watcher said its impact would probably be determined by how tough the two regulators were willing to be.
  "No matter how the law gets written, it's how the regulators implement it and who they chase for non-compliance that determines its real-world effect," said Andrew Ferguson, from the Thinkbroadband news site.
  "Ofcom has a history of being a light-touch regulator - it tends to concentrate on market failures rather than trying to drive the whole market forward."
target: The government has proposed new powers to fine mobile network operators and pornographic website owners.