Lawmakers in Washington are making it easier for Americans struggling with the fallout from the coronavirus to draw on the trillions of dollars in their 401(k)s and other retirement accounts.

For a limited time, Americans will be able to withdraw money from tax-deferred accounts without penalties under a stimulus package signed into law Friday by President Trump. Rules on 401(k) loans will be relaxed, and some retirees can avoid so-called required minimum distribution, or RMD, rules that might have been onerous.

Some of the changes mirror what’s been done for retirement savers after previous disasters. In general, though, the adjustments are “much more significant than what was done for the California wildfires or the hurricane in Houston,” said Gregg Levinson, senior director, retirement, at Willis Towers Watson.

That’s needed because “with Covid-19, we are in uncharted territory,” said Will Hansen, chief government affairs officer for the American Retirement Association. “With 3.3 million people filing for unemployment last week, I think we’ll see a lot more usage of these provisions.”

Loose rules

One provision lets investors of any age take as much as $100,000 from retirement accounts this year without paying an early withdrawal penalty. They also can avoid taxes on the withdrawal if the money is put back in the account within three years. If it can’t be returned, taxes can be paid over three years.

The legislation requires that the money be a “coronavirus-related distribution,” but the rules are loose. People diagnosed with the virus are eligible, along with anyone who “experiences adverse financial consequences” as a result of the pandemic, including an inability to find work or child care. Retirement plan sponsors are told to rely on employees’ word that they’re eligible.

It also makes it easier to borrow money from 401(k) accounts, raising the limit to $100,000 from $50,000. The payment dates for any loans due the rest of 2020 will be extended for a year.

When retirees reach their early 70s, they’re required to start taking money out of tax-deferred accounts like 401(k)s and IRAs, and pay taxes on those distributions. The legislation waives those rules in 2020.

Without the change, retirees’ required minimum distributions would have been based on their account balances at the end of 2019, when the amounts were generally much higher than they are now. A similar one-year waiver was offered after the 2008 financial crisis.

Last Resort

U.S. individual retirement accounts, 401(k)s and other defined contribution plans held almost $20 trillion in assets at the end of 2019, according to the Investment Company Institute. Those totals almost certainly have dropped since then as global stock markets tumbled.

While tapping one’s 401(k) may be a necessity, Levinson said people should view it as a last resort. “Don’t mortgage your future if you have other options,” he said.

He thinks the $100,000 loan amount allowed is too high, and that people may jump at that number and later regret taking out that much.

Americans ages 25 to 55 pull about $69 billion per year from retirement accounts, according to a U.S. Government Accountability Office report issued last year.

The $2 trillion package was approved by the Senate late Wednesday and passed by House on Friday. President Donald Trump quickly signed the bill into law.

More coronavirus coverage from Fortune:

—Millions of Americans won’t be able to pay their bills this month. What financial experts advise
—401(k) no-penalty withdrawals: Everything you need to know
—What does furlough mean? Everything you need to know about work furloughs amid coronavirus
—USPS might have to shutter by June after relief bill provided no new funding
—17 companies that are hiring during the coronavirus crisis
—Everything you need to know about stimulus checks
—The quickest way to boost the economy isn’t even being considered. Why?
—Close to retirement and panicking? How to avoid locking in losses
—What comes after a bear market? You will like the answer
—What to do if you’re worried about getting laid off

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