FLR(M) extension and IELTS expiry date

[zakpk]

Hi,

My wife applied FLRM - 5 year route in July 2015 and she did B1 for English language requirement. Her B1 had SELT number but had validity for 2 years only. Her initial spouse visa is due to expire after 2.5 years in Feb 2018. She will be applying for the spouse visa extension. I was trying to find out does she need to take another English test? It seems from Para 32D that her previous B1 (though expired) should work for her visa extension application. Can you confirm please?

Regards,
Zaheer