63 STAT.] MULTILATERAL-TELECOMMUNICATIONS-OCT. 2, 1947 kChapter VIII, art. 20 RR) (461-470) 461 (IX) Maps of: 462 a) Coast stations open to public correspondence. 463 b) Land stations open to public correspondence with aircraft. 464 c) Radionavigation land stations. 465 (X) ColouredCharts showing international and regional allocations of the radio frequency spectrum. 466 (XI) General Radiocommunication Statistics. 467 §2. a) The Secretary General of the Union publishes the changes affecting the documents enumerated in § 1 of this article. Once a month, in the form in- dicated for the Lists themselves by appendix 6, the administrations shall inform him of the addi- tions, modifications and deletions affecting Lists IV, V, VI and VII. The necessary additions, modifications and deletions affecting Lists I, II and III are obtained by him from the notifica- cations of frequency assignments made in ac- cordance with article 11, § 2 for the purposes of the Master International Frequency Register. The necessary changes to List VIII are obtained by him from the information he receives in re- gard to Lists I to VII inclusive. 468 b) For permanent changes affecting the operation of radiolocation stations (List VI) see 1018. 469 §3. In Lists III, IV, V, VI and VII each class of station shall occupy a special section. 470 §4. The International Frequency List and the List of Fixed Stations shall be published separately each year. They shall be kept up to date by the issue of monthly supplements, likewise published separately, every third supplement being recapitulative. 1781
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