As part of the project, the source documents will be drawn up as the basis for the preparation of the II update of PWŚK (II aPWŚK) and the II update of the PGW (II aPGW). The need to develop source documents is implemented on the basis of Article 113 of the Water Law. Taking into account the cyclicality of the implementation of the WFD, these documents must be drawn up successively, within specific deadlines, and should be published in 2021. Failure to carry out any task will directly prevent the preparation of successive water management plans and the water-environmental programme of the country where specific action programmes are included to maintain or improve the status of water bodies. On the basis of the prepared source documents, II aPWŚK and II aPGW will be prepared.