Завис на интересном выражении (выделено моими скобками) - не хватает понимания. Привожу его в предложении - помогите, плз:

Gone are the days when an independent sheet plant (could fly by the seat of its pants) and the increasing pressures of new legislation, not to mention the need to maintain the highest levels of efficiency, all place demands upon the time of the independent sheet plant manager. For insurance and environmental reasons, to name two key areas, it is necessary not only to comply with certain standards, but to provide ongoing proof of that compliance.

Заранее спасибо