4. Key precursors with no or very limited use for permitted purposes. Key components of binary and/or multicomponent chemical weapons. Examples: DF, QL, pinacolylalcohol . Regime I Declarations . All stocks of Group I chemicals should be declared : aggregate quantities of each compound within 30 days and detailed composition and location of each stock to be eliminated before the commencement of each elimination period. All facilities for production of Group I chemicals should also be declared and the declarations should contain information about the facilities, locations and production capacities as well as the compounds produced. Elimination . All stocks of Group I chemicals should be eliminated through destruction. Exceptions to this rule should be very few. One such exception would be a provision allowing for Group I chemicals to be retained for protective and possibly other permitted purposes. Facilities for production of Group I chemicals should also be completely destroyed. Production of Group I chemicals should be prohibited, the exceptions being very few and limited. Such production for protective and possibly other permitted purposes (e.g. pharmaceutical) should take place at a single small-scale production facility. The annual aggregate amount of Group I chemicals produced, retained or acquired through transfer or possessed at any one time should be limited to 1 ton. CD/632 page 3 Furthermore extremely limited production in laboratory quantities (grams/year) could be envisaged in laboratories approved by the State Party. Transfer of Group I chemicals should be prohibited except for limited quantities to other State Parties. The Consultative Committee should be notified in advance of all such transfers. The verification measures applied to the Group I chemicals and the facilities for their production should be the most stringent under the Convention. International inspectors should be present during elimination processes. Permitted 
**Analysis**
The text discusses the regulation of chemical weapons and precursors, with a focus on their production, storage, and elimination. The language used is formal and technical, suggesting a connection to international diplomacy and treaty-making. The text also mentions the role of the Consultative Committee and international inspectors, implying a connection to international governance and cooperation.

**Category**
International trade, Science and technology