Can storage acct , RSV, Backup vaultconfigured with GRS failback from a DR site?

Can storage acct configured with GRS failback from a DR site?    GRS-RA at the DR site but to do a training exercise we must write at the DR location for 1-2 months then failback to primary site?   Can RSV and backup vault also failback to original site after failing over to DR site?,... not there is a need to write at Dr site for backups, blogs, and fileshares.  My concern is that there is no failback mode for storage acct to return back to primary site.