The application for a preliminary decision on an installation requiring authorisation is made as part of an immission control approval procedure, which requires a written or electronic application. To apply electronically for an immission control permit, you can use the online application "Apply for a permit under the Federal Immission Control Act", which adapts to the information you provide, guides you through the application process and provides specific technical information.
The application must be accompanied by the drawings, explanations and other documents required to check the authorisation requirements. If further documents are required by the responsible immission control authority or the respective specialised authorities for an assessment, these must be submitted subsequently.
As soon as the competent authority has completed its examination of the authorisation requirements affected by the preliminary decision and a positive preliminary overall assessment has been fulfilled, you will receive a corresponding decision from the competent authority.
If individual authorisation requirements have been conclusively assessed in the preliminary decision, the approval authority is bound by this in the subsequent approval procedure (staged procedure). However, the preliminary decision does not authorise the construction or operation of the plant. This is only possible when the final authorisation is applied for and granted.