NASHVILLE, Tenn. (AP) -- An administration proposal to close what officials call a tax loophole for commercial properties is running into opposition from lawmakers.

Senate Speaker Ron Ramsey, a Blountville Republican, and House Majority Leader Gary Odom, a Nashville Democrat, have raised concerns over an effort to remove a tax exemption for commercial rents collected by family-owned, non-corporate entities, known as FONCEs.

State Revenue Commissioner Reagan Farr says the exemption is unfair because the same benefits aren't extended to properties that aren't family owned.

But Ramsey said changing the law that's been on the books since 2000 could negatively affect families' estate planning. Odom argues the proposal looks to him like a tax increase.

The proposal is a major part of the governor's annual "technical corrections bill." It is estimated that the bill will bring the state between $15 million and $20 million in new revenue.

(Copyright 2008 by The Associated Press. All Rights Reserved.)