discontinuance of the issue of such documents as well as of refusal to issue a document to particular refugees if this was due to compelling reasons of national security and public order (including refugees prosecuted for offences under civil law). The word “compelling” is to be understood as a restriction upon “reasons of national security and public order”, i.e., not every case which would ordinarily fall under the latter concept could be used to refuse a document but only very serious cases. 4. Besides the obligatory issue of travel documents, there is a facultative issue: sentence two authorizes and leaves it to the discretion of the Contracting State whether or not to issue documents to stateless persons who are in their territory but are not lawfully staying there, i.e., are there on a temporary basis only or even illegally. Special consideration is to be given to stateless persons who need such a document but are unable to obtain it from the country of their lawful residence. It could hardly be the intention of the Convention to request one state to issue a travel document to a resident of another state if the latter refuses to issue the document for compelling reasons of national security or public order. SCHEDULE TO ARTICLE 28 Paragraph 1 1. The travel document referred to in article 28 of this Convention shall indicate that the holder is a stateless person under the terms of the Convention of 28 September 1954. 2. The document shall be made out in at least two languages, one of which shall be English or French. 3. The Contracting States will consider the desirability of adopting the model travel document attached hereto. Paragraph 2 Subject to the regulations obtaining in the country of issue, children may be included in the travel document of a parent or, in exceptional circumstances, of another adult. Paragraph 3 The fees charged for issue of the document shall not exceed the lowest scale of charges for national passports. Paragraph 4 Save in special or exceptional cases, the document shall be made valid for the largest possible number of countries. Paragraph 5 The document shall have a validity of not less than three months an not more than two years. Paragraph 6 1. The renewal or extension of the validity of the document is a matter for the authority which issued it, so long as the holder has not established lawful residence in another territory and resides lawfully in the territory of the said authority. The issue of a new document is, under the same conditions, a matter for the authority which issued the former document. 2. Diplomatic or consular authorities may be authorized to extend, for a period not exceeding six months, the validity of travel documents issued by their Governments.