There is one summary for H.R.3507. Bill summaries are authored by CRS.

Shown Here:
Introduced in House (11/18/2003)

Improving Homeownership Opportunities in High-Cost States Act - Amends the Federal National Mortgage Association Charter Act (Fannie Mae) and the Federal Home Loan Mortgage Corporation Act (Freddie Mac) to include among the exceptions to the prohibition that an outstanding mortgage cannot exceed 80 percent of the securing property's value for a residential mortgage those properties located in a State containing any high-cost metropolitan statistical area (or portion thereof).

Bases such high-cost determination on specified quarterly average one-family home prices.