The framework agreement, which is called Greater Ekofisk Modifications (GEM), is one of the largest maintenance and modifications contracts on the Norwegian continental shelf.
The first GEM contract was signed during the summer of 2002. In the spring of 2011 Aibel was awarded a new frame agreement. This one, which is named Greater Ekofisk Modifications Contract (GEMC), is valid for five years, with options of three plus three years.