Simplify the following text for a Grade 14 native English-speaking person.
Original: In the 1880s , the International Electrical Congress , now the International Electrotechnical Commission ( IEC ) , approved the volt for electromotive force .
Simplified: In the 1880s , the International Electrical Congress , now the International Electrotechnical Commission ( IEC ) , approved the volt as the unit for electromotive force .