Setting up system as a client in IPA

With RHEL 6 and up is it possible for a client to join an IPA domain WITHOUT using the ipa-client binary?

I know that in RHEL 5 it was possible as per the documentation link below:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/configuring_identity_management/setting-up-clients#what-happens-clients