What year did the 12bhp legislation come in for 125 motorbikes?

i had a 21bhp cg125 but can not remeber if it was a 74 or 76 model any help ?What year did the 12bhp legislation come in for 125 motorbikes?if your on about the bhp u can have on acbt it is about 15 not 12 and u can still buy 125 bikes with well over 15What year did the 12bhp legislation come in for 125 motorbikes?I assume this question is for the English market, as best as I can remember the 12hp rule was implemented in May 1982 but you could ride 125's that produced more than 12hp if they were manufactured and registered before that date.