152. No matter which of these modalities is being contemplated, agreements would need the kind of definitions and comparability standards that have been prepared by this and earlier groups of experts. Common acceptance of definitions as well as of concepts concerning measurement, comparability, verification and other related matter6 would constitute necessary conditions for an agreement on a reduction of military expenditures. 153. Although these and other related issues may be of both a technical and political character and of such a nature that they can only be finally resolved throuqh, actual negotiations, they may, nevertheless, in a preliminary stage, deserve to be examined. There is, undoubtedly, a large number of such issues, fr’om which the Group has chosen the following examples: (a) Main obstacles to progress towards neqotiations and the linkage between “technical” and “political” elements: (i) Which are, at present, the main “technical” and “political” difficulties in the way of making progress towards obtaining international agreements ‘to reduce military expenditures? / . . . A/40/421 English Page 57 (ii) (iii) lb) (i) (ii) (iii) (iv) (VI (vi) (cl (i) (ii) (iii) ( iv) What is the nature and scope of the interrelationship between “technical” and “political” expenditures? =lements with regard to agreements to reduce military In which way might aqreements to reduce military expenditures be related to other disarmament agreements? Framework of negotiations: Should a negotiation in the first place involve a very limited number of States such as the two major Powers or the most important military Powers or should it involve all States belonging to opposing defence organisations? which other sets of countries might start negotiations, perhaps in a regional context? In which way might developments outside of neqotiating Parties affect their basis for neqotiation and how could such developments be taken into account? In reduction of military expenditures, what would be the role played by 
**Analysis**
The text appears to be discussing the possibility of international agreements to reduce military expenditures, and the issues and challenges that need to be addressed in order to achieve this goal. The language used is technical and diplomatic, indicating a focus on international relations and political negotiations. The text mentions "technical" and "political" elements, which suggests that the category should be related to international relations, politics, or diplomacy.

**Category**
International relations, Politics