Not sure why SQ9MDN deleted the post but I think the way how it works is:
Contact the SOTA Team via the form: https://www.sota.org.uk/Contact
Based on requests from other countries that want to join the SOTA programm the main issues is the availability of accurate maps. Especially for naming summits but even more important to apply the 150 m elevation prominance rule.
This meas that all qualified summits in a region need to be made available. Cherry picking just some summits is not done anymore as far as I understand. But starting with one region is an option. But I guess you are probalby already in contact with the MT.
And in the post by SQ9MDN there was another valid point that this likely will require a team for motivated region managers and assoziation managers to get things prepared. Month of map work and preperation ahead…
I wish you all the best and looking forward to another assoziation to visit 
73 Joe