If any National Renewable Energy bill is passed, it could be as simple as:
"To the extent that it is cost effective to do so, beginning in 2025 the annual retail electric sales of each electrical corporation providing power across state lines shall consist of qualifying electricity or renewable energy certificates in an amount equal to at least 20% of adjusted retail electric sales."
Utah has Renewable Energy Goals as State Law.
"To the extent that it is cost effective to do so, beginning in 2025 the annual retail electric sales in this state of each electrical corporation shall consist of qualifying electricity or renewable energy certificates in an amount equal to at least 20% of adjusted retail electric sales."
http://www.le.utah.gov/UtahCode/getCodeSection?code=54-17-602
The bill that was passed:
http://le.utah.gov/~2008/bills/sbillenr/sb0202.htm
Curtis S. Bramble, Utah State Senator (R), District 16 invited all groups effected or interested that would sit at the table to get involved in the bill. In this case, Senator Bramble was a consensus builder. No one voted against this bill, House or Senate. That is what we need nationally, and it isn't happening.
Does it work? See:
http://geology.utah.gov/emp/energydata/statistics/renewables6.0/T6.8.xls