The Trump administration plans to unveil a major revision to decades-old banking rules that mandate lending to low-income borrowers.

Changes to the regulations of the Community Reinvestment Act—a law first enacted in 1977—could potentially transform the way banks make billions of dollars in loans, investments and donations to customers in low- and moderate-income areas. In all, any changes could make it easier for banks to meet certain lending requirements and lower penalties for compliance problems.

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