++++ 1. Procedure - Application originating the proceedings - Formal requirements - Brief statement of a plea in law - Development in the reply - Defendant' s arguments submitted, for the first time, in the rejoinder - Observance of the principle of audi alteram partem (Statute of the Court of Justice of the EEC, first paragraph of Art. 19; Rules of Procedure, Art. 38(1)(c) ) 2. Officials - Pensions - Old-age pension - Calculation - Official in receipt of a termination of service allowance - Acquisition of further rights to pension - Concept (Staff Regulations, Art. 77; Council Regulation No 3518/85, Art. 4(7) )