The increase in interlibrary loan (ILL) service, the desire of more institutions to share resources, and the unstable nature of grant funds to support such activity, led the Metropolitan Detroit Medical Library Group (MDMLG) to adopt a formal voluntary interlibrary loan agreement in 1970. In brief, the agreement states that borrowing libraries will not ordinarily request books and journals in current or recurring demand, bulky or fragile material, rare material in the original, photocopies of the extremely long articles, materials for class reserve or other group use, reference material in the original, or multiple copies of one article. The most significant addition to the agreement was the incorporation of a section that provides for an Evaluation Committee. The Committee is the mechanism through which the Group will make self-evaluations and recommendations for action as bureaucratic restraints grow from within. The primary purpose of the Committee is to monitor ILL policies not to administer them. An account of the Committee's efforts to collect data on ILL policies of the signatories of the Group's ILL Agreement, and its recommendations for a uniform policy is presented. (Author/NH)