Location of the negotiations
Hosting a negotiation session, such as the COP, is prestigious and the host will do whatever it can to make the session a success so that the agreement can be named after the city where the session was held (e.g., Berlin Mandate, Kyoto Protocol, Buenos Aires Plan of Action, Bonn Agreement, Marrakech Accords, Bali Plan of Action, Cancun Agreement, Durban Platform, Paris Agreement). This could affect the negotiation position of the host country. For example, in order to contribute to the success of COP-3 in Kyoto, the Japanese government was willing to accept relatively strict emission reduction commitments under the Kyoto Protocol, in an effort to show the right example.
Availability of documents
All official documents (i.e. reports, negotiation texts, etc. prepared by the official secretariat of the UNFCCC) to be discussed at UN negotiation sessions need to be made available at least six weeks before the session in the six official UN languages: Arabic, Chinese, English, French, Russian and Spanish. In practice, however, this rule is difficult to comply with as compiling official texts and translating these into the six languages is a time-consuming process (several tens of official documents are submitted to negotiations). Not rarely, texts become only available at the meeting itself and only in English, which makes negotiations on these texts more difficult for non-English speaking (or even non-native English speaking) negotiators. This could delay negotiations as delegates at COP negotiations could refuse to continue negotiating without the availability of a text in their own UN language (which actually happened in the past).