This document provides guidelines for submitting bids, proposals, and quotations to Collin County Purchasing Department. It emphasizes that all submissions must be sealed and marked appropriately, with manual ink signatures. Electronic submissions are accepted through BidSync but remain locked until the official opening date. The official time of receipt is determined by the time/date stamp clock in the Purchasing Department, and late submissions are not considered. The document also mentions that any alterations made before the opening date must be initialed, and no changes can be made after the submission deadline. Collin County is exempt from taxes, so prices should not include taxes. Addenda issued by the Purchasing Department may provide interpretations, corrections, or changes to the bidding documents, and it is the bidder's responsibility to verify their issuance. Collin County reserves the right to make awards based on its best interest. The document also covers minimum standards for bidders, guidelines on gifts to county officials, and the release of information under the Texas Public Information Act. It states that a bid/quote/proposal, when accepted, forms a binding contract, with the exception of an Amendment and/or a Change Order.