This document outlines the Bid Securing Declaration required for participation in public procurement processes. It specifies conditions under which bidders may be blacklisted for non-compliance. The declaration mandates bidders to accept blacklisting for up to six months if they withdraw or modify bids during validity, disagree with arithmetical corrections, or fail to sign contracts or furnish performance security. It also clarifies the expiration conditions of the declaration and requires authorized signatures from bidders.