No. 3 Electronic and Postal Communications 2010 17 “network facilities” means any element, or combination of elements, of physical infrastructure used principally for, or in connection with, the provision of one or more network services or multiplex operations, but not including customer equipment; “Network Service” means a service for the carrying of information in the form of speech or other sound, data, text or images, by means of guided or unguided electromagnetic energy but does not include services provided solely on the customer side of the network boundary; “Network Service Licence” means an electronic communications licence entitling the holder to provide one or more network services; “network service licensee” means a holder of a network service licence; “parcel” means a postal article which is posted at a post office as a parcel or is received at a post office by parcel post; “physical co-location” means a type of co-location where the party controlling the building, tower or other structure in or on which another party’s switches, antennas or other electronic communications equipment are accommodated, also allows the other party to operate those switches, antennas or other electronic communications equipment; “post” means a system for the collection, dispatch, conveyance, handling and delivery of postal articles by or through a public postal licensee; “postcode” or ‘’postal code’’ means a series of letters or digits appended to a postal address for the purpose of making the processing and delivery of mail precise, easier and faster; “post office’ means any building, house, room, vehicle or place where postal articles are received, delivered, sorted, made up or dispatched; “postage” means the fee chargeable for the transmission by post of postal articles; “postage stamp” means any label or stamp for denoting any postage or other sum payable in respect of a postal article, and including any adhesive postage stamp or stamp printed,