(NBC NEWS) A national charity whose executives earn six-figure salaries used a legal loophole to pay disabled workers as little as three and four cents an hour, according to documents obtained exclusively by NBC News.

An NBC News investigation recently revealed that Goodwill Industries, which is among the non-profit groups permitted to pay disabled workers far less than minimum wage because of a federal law known as Section 14 (c), had paid workers as little as 22 cents an hour.

Now newly obtained federal documents show that at least 13 Goodwill franchises in 10 states paid 140 workers even less.

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