Washington: It’s an end of an era for the thousands of US college students who rely on MasterCard or Visa to get them through tight times.

Under a new law awaiting President Barack Obama’s signature, credit card companies will be prohibited from giving cards to people under the age of 21 unless they can prove they have the means to repay the debt or a parent or guardian co-signs for the loan.

Congress passed the bill this week, and Obama was expected to sign it into law on Friday. The changes will go into effect in nine months.

“The hope is that when they spend, they’ll spend under better terms and there’ll be fewer traps for them,” said Pedro de la Torre, a spokesman for Campus Progress, a progressive group in Washington that tracks issues affecting young people.

Congress is hoping to break a vicious cycle: A cardholder falls behind in paying the bill and watches helplessly as the interest rate spikes on the existing balance. Buried in higher rates and late fees, the cardholder spend less, which hurts local businesses.

College students are particularly vulnerable.

According to Campus Progress, aggressive marketing by the card companies and multimillion-dollar agreements with universities have presented young people with ample opportunities to borrow money they can’t repay. College seniors with credit cards are graduating with an average balance of $4,100, a 41% increase in the past five years, the group says.

In addition to curbing the number of young people who can obtain a card, the legislation would set new limits on when and how banks charge fees.

“This will allow consumers to make informed choices about how best, and whether, to use a credit card, or to shop around for better terms,” House speaker Nancy Pelosi said after the House passed the bill on Wednesday, 361-64.

The Senate approved the bill on Tuesday, 90-5.

The banking industry opposes the changes.

“Less credit will be available generally, which means some consumers and small businesses will not be able to obtain credit cards at all, particularly younger people and startup small businesses,” said Edward Yingling, president and CEO of the American Bankers Association.