"Exelon remains committed to Antelope Valley Solar Ranch One and expects to receive the initial loan advance upon resolution of the construction-permit issue, " said Exelon spokesman Paul Elsberg.

WSJ: California Solar Deal Hits a Snag

Sometimes the farmer pays for the labor in advance, or offers a loan, charging the parents interest of 1.5% to 2% a month.

FORBES: Child Labor

If the Obama administration wants to advance justice, it would abolish farm-loan programs and stop letting politicians pick winners and losers in rural America.

WSJ: James Bovard: Rotten Tomatoes for a Billion-Dollar Farm Payout

First, under the Basel system that allows big banks with "advance" status to set their own evaluations of the riskiness of different categories of loan - the so-called risk weights - there is not enough consistency in how much capital different banks hold to cover similar risks.

BBC: UK banks 'still short of capital', says BoE