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Explanation: the "trimestres" are the three-month periods which form the basic unit used to calculate retirement and employment benefits in France, "validation" here I think means basically that they are going to take account of these periods.
Thus you find 60 something year olds hanging on at work for a bit longer to make up enough "trimestres" to qualify for a (better) pension, and so on.
Eutychus Local time: 21:44 Specializes in field Native speaker of: English PRO pts in category: 99
1 hr confidence:
Explanation: The British talk about "qualifying years" when calculating retirement benefit. Since the French have a term-based system perhaps you could use qualifying terms or quarters (UK / US ?)