The IESG has received a request from the SIDR Operations WG (sidrops) to consider the following document: - 'RPKI Certificate Tree Validation by the RIPE NCC RPKI Validator' <draft-ietf-sidrops-rpki-tree-validation-02.txt> as Informational RFC An "Informational" specification is published for the general information of the Internet community, and does not represent an Internet community consensus or recommendation. The Informational designation is intended to provide for the timely publication of a very broad range of responsible informational documents from many sources, subject only to editorial considerations and to verification that there has been adequate coordination with the standards process (see section 4.2.3). The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2018-08-10. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract This document describes the approach to validate the content of the RPKI certificate tree, as it is implemented in the RIPE NCC RPKI Validator. This approach is independent of a particular object retrieval mechanism. This allows it to be used with repositories available over the rsync protocol, the RPKI Repository Delta Protocol, and repositories that use a mix of both. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-sidrops-rpki-tree-validation/ IESG discussion can be tracked via https://datatracker.ietf.org/doc/draft-ietf-sidrops-rpki-tree-validation/ballot/ No IPR declarations have been submitted directly on this I-D.