"The agreement of shareholders to pass over control to Lionheart is an essential condition for this deal to be completed satisfactorily, " the statement read.
Regional leaders and the African Union had called for the rebels' withdrawal from Goma, supposed to have been completed by Thursday, as a condition of starting negotiations.
He wrote that less than half of the urgently required maintenance will be completed over the next five years, leaving council buildings in a declining condition and jeopardising future service delivery for the public.