For all requests for opinions for establishing buildings, wind turbines, permanent or temporary constructions or installations at a location that may present a risk to aviation, you can address the skeyes Urbanism service. Requests can be submitted by private individuals and companies for temporary permits or preliminary opinions and for official permits via public services, the Directorate-General for Air Transport (DGLV/DGTA) or via the Omgevingsloket voor Vlaanderen.