Fifa have ordered goal-line technology companies to take out insurance cover in case clubs or leagues take legal action claiming the systems are not working properly.
Hawk-Eye and GoalRef today received official authorisation to install their systems worldwide after being granted licences by Fifa.
But the companies have had to provide insurance so that if the systems fail - either failing to spot the ball has crossed the line or registering wrongly that the ball was over the line - they are covered if legal action is launched against them.
It also covers any claims if a player or official says they have been injured by the equipment.
The Fifa rules on insurance for goal-line technology state: "This policy should provide sufficient insurance coverage for claims being raised by third parties due to the licensee's activities or omissions (failure to act) as well as claims being raised due to potentially faulty (manufactured) products.
"A claim is deemed as a demand for compensation of bodily injury, property damage and pure financial loss. The policy shall be concluded with a well-respected and reputable national or international insurance company."
The granting of the licences means the systems can now be installed in stadiums, after which they will undergo a final inspection by an independent test institute before being allowed to function.
The first competitive tournament using the systems is expected to be Fifa's Club World Cup in Japan in December.
Meanwhile, German company Cairos developing a third system are applying to be approved by the International FA Board at their meeting in Scotland in March.