Serf, CHC have given the owners time to come and collect them, 30 days in Europe and N America, 45 elsewhere.
CHC agreed to keep them insured, that's it. The leasing companies may well ask CHC to help them demobilise them, but that will be private agreements between CHC and the leasing companies (LC), indeed I'd expect the LC to pay for the demob to a place of their choice.