The Commission prepared a checklist for the description of incommensurate modulated crystal (IC) structures and this was approved by the Executive Committee. This document specifies the relevant parameters and information which should be included in a database or publication for complete characterization of IC structures. It should also assist journal editors and referees in their activities.

Work has been started on the extension of the CIF (Crystallographic Information File) dictionary for the inclusion of incommensurate structures. The creation of a database containing the information on the IC structures published to date is under discussion.

The Commission participated in the preparation of many conference programmes in the field of quasi- and incommensurate crystals. In particular, the Commission established the programme of the Open Commission Meeting on Quasicrystals and Incommensurate Crystal Structures, which took place during the Beijing Congress. The Commission also agreed to participate in the preparation of the programme of the Seattle Congress in 1996, ECM-16 (Lund, 1995) and the Quasicrystals International School (Balatonfiired, 1995).

The Commission had the opportunity to meet in Beijing to discuss the preparation of the Aperiodic'94 meeting which will take place in Les Diablerets, Switzerland, 18-22 September. This meeting will continue the tradition of the former MOSPOQ conferences held on a triennial basis under the responsibility of  the Commission. The first circular was distributed at the Beijing meeting.