65As regards the objective necessity of a restriction, it must be observed that inasmuch as the existence of a rule of reason in Community competition law cannot be upheld, it would be wrong, when classifying ancillary restrictions, to interpret the requirement for objective necessity as implying a need to weigh the pro and anti-competitive effects of an agreement (see, to that effect, M6 and Others v Commission, paragraph 62 above, paragraph 107).