Parent-Child Sites can only be set up on self hosted sites. It will be enabled on a case-by-case basis
On some specific servers, we will enable a Parent-Child relationship to be set up so that Event Forms, Profile Forms and Users can be shared/linked between sites
When this is enabled, different sites on the same server can be set up in a parent-child relationship. This means Event Form, Profile Forms and Database can be shared between sites, and data entered for an athlete on one site can be available on another.
Once this feature is available, it will only be released to clients on a case by case basis. Moreover, it will only be available for clients who are self hosted, who have more than one site on their server.