The agency is charged with writing and enforcing rules that flesh out the law passed by Congress.

Some provisions are required under the law, but the agency had broad discretion in designing many of the new requirements.

The rules limit features like teaser rates that adjust upwards and large “balloon payments” that must be made at the end of the loan period.

They include several exceptions aimed at ensuring a smooth phase-in and protecting access to credit for underserved groups. For example, the strict cap on how much debt consumers may take on will not apply immediately. Loans that meet separate federal standards also would be permitted for the first seven years.

Balloon payments would be allowed for certain small lenders that operate in rural or underserved communities, because other loans may not be available in those areas.

The bureau also proposed amendments that would exempt from the rules some loans made by community banks, credit unions and nonprofit lenders that work with low- and moderate-income consumers.