My company is interested in participating in tenders with the City of Königswinter. How can we register for their bidder database? Please explain the registration process, what company information is required, and provide the mailing address for sending the registration form.
Navigate to 'koenigswinter.de'. Click on 'Rat & Verwaltung'. Click on 'Ausschreibungen'. Click on 'Aufnahme in die Bieterdatei'. Read the content on the 'Aufnahme in die Bieterdatei' page, scrolling if necessary, to identify the registration process, required company information, and the mailing address. Synthesize the gathered information into a concise answer.
Explain that registration involves filling out and sending a signed 'Bieterselbstauskunft' (bidder self-disclosure form) to the Central Procurement office. State that both standard and specific company details are required. Provide the mailing address for sending the form: Stadt Königswinter, Zentrale Beschaffung, Dollendorfer Straße 39, 53639 Königswinter.