when :format1
            procurement_code = header.xpath("./div[@class='MainHeader'][1]").inner_text
            bulletin_and_year = header.xpath('./div[2]').inner_text.gsub(/ /, '').match(/Vestník.*?(\d*)\/(\d*)-(\S*)/u) || header.xpath('./div[3]').inner_text.gsub(/ /, '').match(/Vestník.*?(\d*)\/(\d*)-(\S*)/u)
          when :format2