declarations of performance and the CE marking) in the admissible electronic form has been analyzed. Despite the fact that as at 24 February 2014 this means was formally accepted pursuant to the Commission Delegated Regulation (EU) No. 157/2015 dated 30 October 2013 on the conditions for making a declaration of performance on construction products available on a website (EU OJ L 52 of 21 February 2014, p. 4)), in practice its use in Poland is far from the intentions set forth in the legal act. As follows from the analysis of the websites of aggregate producers who are associated in Polish Aggregates Association PZPK, the producers prefer individualized forms of transmitting documents (paper or electronic by e-mail) and avoid making them available on their websites. This does not correspond with the aims set forth in the said regulation consisting in the use of new IT technologies to cause a reduction of costs incurred by the producers of construction products and by the construction sector as a whole.