It is hardly required to be stated that, as per the well established principles of interpretation of statute, unless it is expressly provided or impliedly demonstrated, any provision of statute is to be read as having prospective effect and not retrospective effect. Under the circumstances, we find that substitution made by clause (c) to (f) of sub-section (1) of Section 200A can be read as having prospective effect and not having retroactive character or effect. Resultantly, the demand under Section 200A for computation and intimation for the payment of fee under Section 234E could not be made in purported exercise of power under Section 200A by the respondent for the period of the respective assessment year prior to 1.6.2015. However, we make it clear that, if any deductor has already paid the fee after intimation received under Section 200A, the aforesaid view will not permit the deductor to reopen the said question unless he has made payment under protest.