CPC question

I’m taking my cpc in September i did one module in 2015 so four to complete so just wondering how it’s applied when my existing cpc expires.

Darkspirit:
As we all know the first cpc’s expire 9th September i have one module done in 2016 but i’m in two minds about returning to hgv driving,so if i don’t take four more modules by then does that one expire or will it still stand until i take the other four.

The 7 hours done in 2016 will be valid until 2021

If for example you do the other 28 hours before that 7 expires then all 35 will be converted into a DQC lasting 5 years from the date of the last 7 of the 35 completed

Thankyou,much appreciated.