translate English to French: Both before and after 1980, Brown had been assigned a G4 grade, the  grade assigned to individuals considered unfit for medically isolated  postings, because of a medical disability, or to any individual who  has a medical condition that has the potential for sudden, serious  complications. Until November of 1980, Brown had been assigned an O2  rating, the grade ordinarily assigned to individuals who are free from  medical disabilities, except those minimal conditions that do not  impair the individual's ability to perform at an acceptable level of  endurance in a front-line combat environment and do heavy physical  work. In November of 1980, Brown's occupational grade was changed to  "O3", the grade assigned to individuals who have moderate medical or  psychological disabilities which prevent them from doing heavy  physical work or operating under stress for sustained periods,  although they will be able to perform most tasks in moderation.
Jusqu’en novembre 1980, Brown avait une cote O2, celle attribuée d’ordinaire à celui qui est sans infirmité médicale, si ce n’est quelques points faibles qui ne l’empêchent pas d’accomplir un travail physique pénible et d’atteindre un niveau d’endurance acceptable lors d’un combat au front. En novembre 1980, la cote professionnelle de Brown a été réduite à «03», soit la cote attribuée à celui qui souffre d’une légère affection médicale ou psychologique l’empêchant d’accomplir un travail ardu ou de travailler sous tension sur de longues périodes, mais qui peut accomplir la plupart des tâches en travaillant avec modération.