Operational Procedures and Arrangements may also be subject to the Single European Sky Interoperability Requirements and Implementing Rules.
Non-ATS Providers classified as CNS/ATM Providers: The technical procedures related only to the particular CNS/ATM Service related systems apply, typically NDBs.
Providers of any of the services defined as Communications, Navigation and Surveillance may be required to hold a Certificate in accordance with Regulation (EC) No. 554/2004 on the provision of air navigation services in the Single European Sky.
Information regarding Certification can be found on the CAA's Certification and Designation web pages.