Dear colleagues ETNO's recently submitted a contribution, titled "IP Addressing in a post IPv4 World-Principles", to the RIPE address-policy-wg mailing list (available also to the ETNO web site, http://www.etno.be/Default.aspx?tabid=2058). This contribution provides an analysis on why, according to ETNO Members, any emerging marketplace should not determine IPv4 address exhaustion management. Quoting some basic arguments from the abovementioned contribution, ETNO believes that it is the successful bottom-up processes that keep the Internet community from being engaged in discussions regarding intervention or new models of governmental control and therefore it is the Internet community that should take all the appropriate measures in order to adhere to the current governance model. Facilitating a market based on the principle that attaches an intrinsic "value" to an IP address would engage competition authorities, policymakers and will raise legal issues. This should be carefully considered before introducing policies that will facilitate a market. Therefore, ETNO has some strong concerns regarding the possible impacts of the introduction of a transfer option or an open market option. This does not mean that ETNO fails to recognise the possibility that future transactions that will involve transfers of IP addresses between entities for profit. It means that internet community will need to carefully consider the implications of assisting such a process, taking as a starting point that the Internet community wants to preserve the current internet governance bottom-up processes. If a market emerges, future developments relating to IPv4 addresses must not undermine the viability of the Internet. Therefore based on the above, ETNO members could not support the 2007-08 Policy Proposal, Enabling Methods for Reallocation of IPv4 Resources. Christina Kelaidi ETNO Naming Addressing and Numbering Issues WG.