Alliance Resource Partners, L.P.

America First Tax-Exempt Investors, L.P.

AmeriGas Partners, L.P.

Boardwalk Pipeline Partners, L.P.

Breitburn Energy Partners, L.P.

Calumet Specialty Products Partners, L.P.

DCP Midstream Partners, L.P.

Dorchester Minerals, L.P.

El Paso Pipeline Partners, L.P.

Enbridge Energy Partners, L.P.

Energy Transfer Partners, L.P.

Enterprise Products Partners, L.P.

Exterran Partners, L.P.

Ferrellgas Partners, L.P.

Inergy, L.P.

Kinder Morgan Energy Partners, L.P.

MarkWest Energy Partners, L.P.

Natural Resource Partners, L.P.

NTS Realty Holdings, L.P.*

ONEOK Partners, L.P.

Penn Virginia Resource Partners, L.P.

Plains All American Pipeline, L.P.

StoneMor Partners, L.P.

Suburban Propane Partners, L.P.

Sunoco Logistics Partners, L.P.

TransMontaigne Partners, L.P.

Vanguard Natural Resources, LLC

W.P. Carey & Co. LLC