My understanding of how a SM is appointed is that if you recieve a ruling that a SM is to be appointed the person (or EC or OC) that won the ruling has to provide the details of the SM. I would assume they are given a suitable time frame to find one.
Generally it would be an individual that has brought the case for a SM to be appointed to run the Strata because the OC and EC are dysfunctional and so it would be pointless expecting them to provide a SM.