Clarification of the Limits of the Delegated Authority to District/City Engineers re Infrastructure Contracts and Related Matters. Category: Department OrderSeries: 1990No: 146File: DO_146_S1990.pdfDate: Friday, July 20, 1990Tags: Limits Authority District City Engineers Infrastructure Contracts areas 146 Read more about Clarification of the Limits of the Delegated Authority to District/City Engineers re Infrastructure Contracts and Related Matters.