(b) those activities need to be carried out without delay in order to protect — (i) the integrity of a network facility; (ii) the health or safety of persons; (iii) the environment; (iv) property; or (v) the maintenance of an adequate level of service. 224. Road, etc. to remain open for passage. If a network facilities provider engages in an activity covered by section 215, the provider shall ensure that the network facilities installed over a road, bridge, path or navigable water are installed in a way that will allow reasonable passage by persons, vehicles and vessels. 225. Network facilities installation permit. A network facilities provider may apply to the Commission, in the manner as provided in the regulations, for a network facilities installation permit authorising the network facilities provider to carry out the installation of one or more network facilities. 226. Criteria for issue of network facilities installation permit. The Commission shall issue a network facilities installation permit that authorises a network facilities provider to carry out the installation of one or more facilities if the network facilities provider has satisfied the Commission that — (a) both of the following conditions are satisfied: (i) the provider has made reasonable efforts in good faith with each proprietor whose approval is required or would, apart from section 215, be required, for carrying out the installation; and (ii) at least one of those approvals has not been obtained within fourteen days after the beginning of the negotiations concerned; (b) each State Authority, local authority or other authority, whose approval is required or would, apart from section 215, be required, for the installation of the network facilities, has given such approval; (c) the network facilities are, or are likely to be, part of another network facility of national significance; (d) the network facilities are, or are likely to be, an important part of another network facility; (e) any of the following conditions is satisfied: (i) the network facilities are part of another network facility, the greater part of which has already been installed;