Agent TypeOrganisationActivities & OccupationsTrade union peak bodiesHistoryIn 1977, 2,500 maintenance workers employed by the SEC in the La Trobe Valley were involved in an eleven week strike. The Combined SEC Unions was created from local union officials and rank and file members and designed to co-ordinate industrial action against the State Electricity Commission. Eleven unions went on strike and the industrial action was considered one of the major disputes of the last forty years.