Do I need to submit Form 15G every year ?

Hello,

Suppose my annual income is below taxable limits and I wish to open FD for Rs. 1.5 lakhs for 5 years

Should I submit Form 15 G only first (one) time when opening FD? or

Should I submit Form 15G when opening FD and also at the beginning of every financial year, until the FD is completely matured?

Thanks