AIA Document C401™–2007 is a standard form of agreement between the architect and the consultant providing services to the architect. AIA Document C401–2007 is suitable for use with all types of consultants, including consulting architects. This document may be used with a variety of compensation methods. C401–2007 assumes and incorporates by reference a preexisting owner/architect agreement known as the “prime agreement.” AIA Documents B101™–2007, B103™–2007, B104™–2007, B105™–2007 and B152™–2007 are the documents most frequently used to establish the prime agreement. C401–2007 was modified in 2007 to be shorter and more flexible by “flowing down” the provisions of the prime agreement, except as specifically stated in C401. NOTE: C401–2007 replaces AIA Document C141™–1997, which expired on May 31, 2009.