[BCP238]   Best Current Practice 238,
              <https://www.rfc-editor.org/info/bcp238>.
              At the time of writing, this BCP comprises the following:

              Yan, Z., Bush, R., Geng, G., de Kock, T., and J. Yao,
              "Avoiding Route Origin Authorizations (ROAs) Containing
              Multiple IP Prefixes", BCP 238, RFC 9455,
              DOI 10.17487/RFC9455, August 2023,
              <https://www.rfc-editor.org/info/rfc9455>.