text: The declaration of production sites (geographical location, production capacity, toxic substance manufactured); The closure and placing under seal of those various facilities; Their placing under international control; The transformation of one or more production plants (isolated military factories) into a destruction plant. The next three years should be devoted to the conversion to other uses of various production units: Factories for the manufacture of lethal supertoxic substances or of incapacitating agents that form part of a military complex; Civilian factories which have manufactured key precursors for supertoxic substances; CD/630 page 13 Special-munitions assembly shops or shops preparing munitions for shipment ; and to the destruction of munitions-filling shops. The final three years should be reserved for the destruction of isolated facilities for the manufacture of lethal supertoxic substances or of incapacitating agents and of isolated and specific facilities for the manufacture of key precursors for supertoxic substances. Thus, the production structure would have been completely dismantled by the end of this eight-year period. The remaining two years would see the completion of the last destructions (if necessary) and the definitive verification of facilities taken out of service. 4. Verification Systematic international verification of initial declarations and of the mothballing or conversion to other uses of production facilities would be mandatory. Sensors would be installed at various key points in facilities and read periodically: intervals of one year would seem suitable. Each conversion, each destruction would have to be effected under systematic international control. In the event of there arising anything of such a nature as to cause one of the parties to the convention doubt concerning the way in which the obligations entered into are being discharged, a request for a challenge inspection may be made to the competent international organ. cd/630 page 1-4 IV. DEADLINE SCHEDULES
analysis: This text appears to be discussing the dismantling and verification of production facilities that manufacture toxic substances, likely as part of a disarmament or arms control agreement. The text outlines a schedule for the closure and destruction of these facilities, as well as the installation of sensors and international verification procedures to ensure compliance. The language used is technical and formal, suggesting that the text is part of a formal agreement or treaty.