переключаться на(phase (something) in or phase in (something) : to start to use or do (something) gradually over a period of time : to introduce (something) slowly The country is phasing in new paper currency. The tax cut will be phased in over the next three years. The law will phase tax cuts in over a period of two years. MWALD Alexander Demidov)
по переходной основе(phased in equity ratio – показатель достаточности основного капитала по переходной основе (до введения в силу требований Базель III) Vladimir A.)