UNDERWRITING AGREEMENT Dated as of December 5, 2006 among SIMON PROPERTY GROUP, L.P. and UBS SECURITIES LLC and GREENWICH CAPITAL MARKETS, INC. and MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED and WACHOVIA CAPITAL MARKETS, LLCUnderwriting Agreement • December 8th, 2006 • Simon Property Group L P /De/ • Real estate investment trusts • New York
