“Disclosure of the information” in the framework of CoST projects is the disclosure of opened objective data provided by procurement organizations that order construction / repair work. In addition, procurement organizations agree to provide additional information under Reactive Disclosure, including specifications, reports, general characteristics of facilities, and project performance. The amount of data disclosed by the procurement organization is based on international CoST “proactive” and “reactive” standarts of information disclosure.

According to the international standards CoST IDS (Infrastructure Data Standart), procurement organizations disclose information at all stages of the infrastructure project from the planning stage to operating, under all contracts: for the preparation of design and budget documentation, performance of works, implementation of the independent supervision.
Proactive disclosure refers to the information that procurement organizations disclose about all eligible projects and contracts at these stages during the relevant project cycle. Information is disseminated in a clear presentation and convenient format through a public environment that is open and accessible to a wide range of interested parties.

Reactive disclosure refers to additional information that procurement organizations provide to any individual or company that verifies data for the CoST Construction Transparency Initiative in Ukraine. Reactive disclosure involves providing additional information in an accessible form to the requesting party and placing it in an accessible place.
