For equipment manufacturers’ third line support during the design, deployment and/or operation of networks, impose strict access controls especially for critically sensitive components and/or sensitive parts of the network and in particular for suppliers considered to be high risk within the meaning of SM03. c) Diversification of suppliers SM05 Ensuring the diversity of suppliers for individual MNOs through appropriate multi-vendor strategies Ensure that each MNO has an appropriate multi-vendor strategy taking into account the technical constraints and interoperability requirements of the different parts of a 5G network: To avoid or limit any major dependency on a single supplier (or suppliers with a similar risk profile); To avoid dependency on suppliers considered to be high risk within the meaning of SM03. SM06 Strengthening the resilience at national level Ensure that there is an adequate balance of suppliers at national level to ensure that there is resilience in case there is an incident with one operator and/or one supplier, taking into account the variations in geography and population in individual Member States. R4  Relevant authorities  Operators SA03, SA10 R4  Relevant authorities  Operators SA03, SA10 R4  EC and Member States d) Sustainability and diversity of 5G supply and value chain SM07 Identifying key assets and fostering a diverse and sustainable 5G ecosystem in the EU - Build on the EU’s Foreign Direct Investment screening mechanism to improve the monitoring of FDI investments across the 5G value chain (e.g. through a mapping of key 5G assets, the use of monitoring tools and exploring specific guidelines), in order to better detect foreign investments in the 5G value chain that may pose a threat to the security or public order of more than one EU MS. Critical infrastructure, public security, access to and control of information and cybersecurity are well embedded under the scope of this (FDI) Regulation, allowing the evaluation of investments taking into account factors such as the risk profile of buyers/companies. SA10 - Should dependencies along the 5G value chain arise as a result of trade distorting market behaviour by producers falling under the scope and conditions of the relevant EU anti-dumping and/or anti-subsidy rules – and should these be notified via an ad hoc complaint or in exceptional circumstances via the European Commission’s own initiative – then such behaviour could be investigated and acted upon through the EU’s trade defence measures. 22