Housing and Planning Bill

My noble friend says that if the site was of the relevant kind and the local authority thought that it should therefore be designated in that way, it could do so. But does that mean that if this were a site of importance, the local authority could decide that it would develop it, because that seems to me to be rather difficult given the guidance in the other document? If the local authority cannot designate the site, will my noble friend explain why we cannot include the measure as an amendment to the Bill?