On 19 December, the Autonomous Region of Sardinia, the Universities of Cagliari and Sassari, INFN, INAF National Institute for Astrophysics and INGV National Institute for Geophysics and Volcanology signed an inter-agency agreement for the coordination and promotion in Sardinia of initiatives to support the candidacy of the Sos Enattos mining site to host the Einstein Telescope. The objective of the agreement, of which the Sardinia Region is the leader, is to create permanent coordination that facilitates the implementation of joint actions between the entities involved. The initiatives will have both a promotional purpose - such as strengthening awareness and information on the candidacy, territorial promotion and the valorization of cultural identity and archaeological heritage - and a more strictly scientific and educational one, such as education in scientific and technical fields and the promotion of research activities in various key areas for ET, from geology to architecture to engineering, through environmental and socio-economical impact. Furthermore, among the actions mentioned in the agreement there are also strategic initiatives for the territory, such as the strengthening of air and road transport, the study of solutions for sustainable mobility compatible with ET, the creation of international schools and other initiatives that support the arrival of foreign researchers.