OTTAWA -- Air passengers who are bumped from overbooked flights or forced to sit through long delays could receive up to $2,400 in compensation -- cash or something more than a pile of coffee coupons -- under proposed regulations for the government's long-promised passenger bill of rights.

The proposed compensation will use a sliding scale, with larger airlines and longer delays requiring bigger compensation payments. Payments to passengers whose flights are delayed will max out at $1,000 and cancellations at $2,400 -- but it will be up to the passenger to file a claim with the airlines.

Once draft regulations are published Saturday, Canadians will have 60 days to comment -- meaning there may be one last battle between consumer advocates and airlines over the breadth of the proposed regulations.

Consumer advocates said Monday that they planned to push the government to further tighten rules around tarmac delays and when an airline can get out of paying compensation.

"We want to make sure that the government doesn't take any steps back in what they've already announced, and, if possible, we can move them forward even further," said Ian Jack, managing director of communications and government relations for the Canadian Automobile Association.

Gabor Lukacs, with the advocacy group Air Passenger Rights, said the proposed rules don't make it easy for passengers to receive compensation when things go wrong.

"The public is being deceived here by the government. This has been an industry-friendly legislation that the minister cynically calls an air passenger bill of rights," Lukacs said.

The draft regulations lay out the minimum standards airlines will have to follow for situations in their control -- or face a $25,000 fine. The aim is to have the rules take effect by next summer.

Aside from situations beyond their control, there are loopholes that could allow an airline to get off the hook for compensation -- specifically mechanical issues as defined by the airlines that make it unsafe to fly. Advocates are already calling for a tighter definition so the loophole isn't abused.

Transport Minister Marc Garneau was adamant airlines won't mess around with safety and dismissed the idea that companies will look for ways to get out of compensating passengers.

"If that were to happen -- and I don't believe for one second it will happen -- there would be measures taken to penalize them," Garneau said.

The regulations would also force airlines to automatically seat children under age 14 near their parents rather than require them to pay an additional fee to select their own seats. The rules allow airlines to select seats one seat or one row away from parents for older children.

The regulations would also require airlines to provide food, water, air conditioning and use of bathrooms during tarmac delays, but not require a flight unload passengers until a delay hits three hours.

However, the three-hour limit can get one 45- minute extension if the flight is likely to take off during that period.

A Senate committee recommended no more than 90 minutes after a high-profile incident at the Ottawa airport where two Air Transat flights sat on the sweltering tarmac for hours.

"We chose a time of three hours that...will be applicable to all airlines that we think is fair and that basically achieves that balance between recognizing that at some point you've got to let people off; and on the other hand the other part of it is, people do want to get to their destination," Garneau said.

Scott Streiner, the chairman of the Canadian Transportation Agency, says a key aspect of the rules is an expectation that airlines clearly communicate with passengers about the status of their flight.

A federal analysis pegged the cost to airlines of the new regulations at $2.75 per passenger, and Streiner said it's not clear if airlines will pass those costs along to consumers.

On compensation to passengers, Streiner said the airlines asked for levels that wouldn't be "punitive."

"Many Canadians came forward and proposed various levels of compensation. I have to say that we did not, in fact, when we consulted Canadians on this, get very many people proposing extremely high levels of compensation," Streiner said.

Six things to know about what the Liberals are offering in draft rules

1) For larger airlines, compensation for delays and cancellations is based on how many hours late you arrive at your destination -- so long as the reasons for the delay were within the airline's control and not related to safety issues. All the figures, once finalized, will increase with inflation.

For delays between three and six hours, compensation is $400. Between six and nine hours, $700. And over nine hours is $1,000.

Compensation rules are different for smaller or low-cost airlines, particularly for airlines that service the North. Passengers can receive $150 for delays of three to six hours. The payments go to $250 for delays between six and nine hours, and $500 for delays of nine-plus hours.

2) If you're denied boarding, a similar sliding scale of payments apply. If you're bumped from a flight and the ensuing delay hits six hours, you can receive $900. Delays between six and nine hours equal a $1,800 payment. And over nine hours is $2,400. But unlike delays or cancellations, an airline would have to pay up in cash, for instance, on the spot.

3) Bag lost or damaged? The Liberals want to require airlines to pay up to $2,100 in compensation -- rules that are already enshrined in an international travel convention. The proposed regulations would also require airlines to refund any baggage fees.

4) The regulations would require airlines to provide food, water, air conditioning and use of bathrooms during tarmac delays, but not require a flight unload passengers until a delay hits three hours -- or 90 minutes more than a Senate committee recommended. However, the three hour limit can get one 45 minute extension if the flight is likely to take off during that period.

5) Airlines will also be required to seat children near their parents, eliminating the need for parents to pay an additional seat-selection fee. The rules give the airlines some leeway based on age. Children under five must be seated right beside their parents. Children five to 11 must be in the same row, separated by no more than one seat. Children 12 and 13 years old cannot be separated by more than one row.

6) Violations of the rules could cost airlines up to $25,000 in fines. If, for example, airlines don't communicate quickly and simply what is going on with your flight, or don't rebook you onto a flight promptly, they will be penalized.