This Precedent invitation to participate in dialogue (ITPD) is intended to be used for the competitive dialogue procedure, provided for under regulation 30 of the Public Contracts Regulations 2015 (PCR 2015). The competitive dialogue procedure is for use in complex projects where the public body cannot adequately define the technical specifications or legal or financial make-up of a project. The public body enters into a dialogue with bidders about their requirements before asking a bidder to issue a final tender. The Precedent is initially drafted for issuing at the start of the dialogue phase however, with minor changes it is possible to reissue it as necessary for the subsequent stages. The Precedent is designed to be used for public procurement exercises under the competitive dialogue procedure however, each procurement exercise should be considered carefully as specific modifications may be required on a case by case basis, particularly in relation to evaluation and scoring.