(c) make reasonable decisions in exercising their right of choice; and (d) familiarize with and abide by any safety or security requirements pertaining to the use of communications systems and services. 4. Safeguards. (1) A service provider shall take appropriate technical and organizational measures to safeguard the security of its services. (2) Where there is a particular risk of a breach of the security of the network, a licensee shall— (a) inform the subscribers of the risk; and (b) where the risk lies outside the scope of the measures that may be taken by the licensee, of any possible remedies, including an indication of the likely costs involved. 5. Customer care system. (1) A licensee shall, within the period specified in its licence or by the Commission, establish a customer care system within which customers can make inquiries and complaints concerning its services in such format and containing such details as may be required by the Commission within the time prescribed in the licence or within a reasonable time after the grant of a licence, or as may be specified by the Commission and be available upon commencement of provision of service to the public. (2) The Commission may from time to time publish guidelines relating to the customer care systems that the licensee may establish. 6. Provision of services and sale if ICT terminal equipment. (1) A vendor shall provide all pertinent information on the equipment it offers for sale, including among others, the type-approval or type acceptance status and whether or not such equipment is new or used, to prospective buyers in a clear and unambiguous manner. (2) A vendor shall honour all agreements entered into with a buyer, through the sale of terminal equipment and shall ensure that such equipment is in proper