other cases where a nuance of that kind was desirable. 45. His deleaation was of the opinion that chapter II of the draft articles, dealing with general principles and the riahts and duties of watercourse States, was of prime importance, particularly article 9, upon which the whole draft could be built. As stated in paragraph 336 of the Commission's report, the maxim sic·utere tuo·ut·alienum non laedas should occupy a proper place in the draft. In that regard, there was a potential conflict between the deterreination of equitable and reasonable use of the watercourses, on the one hand, and the prohibition against activities causing appreciable harm, on the other. It was on the latter principle that the emphasis should be put, because the notion of reasonable and equitable use lacked the necessary precision and lent itself to subjective interpretations, as was confirmed by the long, though non-exhaustive list of relevant factors enumerated in article 8. ~oreover, articles 7 and 8 should be read toaether with article 9. 46. Ris deleaation could see no self-evident reason why the Special Rapporteur's decision to discard the concept of "international watercourse system" in favour of the simpler notion of "international watercourse" should be destructive of the inherent unity of international watercourses. However, it still remained to determine the exact consequences of the decision. It was riahtly suggested (A/39/10, para. 296) that scientific and technical advice was needed with a view to amolifyina the definition of international watercourses. In order to remove divergences of view and other points of disagreement, it would be worthwhile to establish an ad hoc working group, as proposed in a general way in paragraph 389 of the Commission's report, to consider the topic of the law of the non-naviqational use~ of international watercourses. / ... A/C.6/39/SR.39 Enqlish Paqe 14 (Mr. Al-Khasawneh; Jordan) 
**Analysis**
The text appears to be discussing international watercourses and the law governing their use, with a focus on the principles and rights of states that share these watercourses. The language used is technical and formal, suggesting that the topic is related to international law and diplomacy. The text also mentions the need for scientific and technical advice, which implies a connection to natural resources and environment.

**Category**
Natural resources and environment, International law and diplomacy