Certificate for lower tax deduction: Assessing Officer may permit lower or no withholding on application by the assessee. An assessee may apply to the Assessing Officer for a certificate authorising deduction of income-tax at lower rates or no deduction where withholding would otherwise apply; the Assessing Officer shall grant such certificate if satisfied the recipient's total income justifies it, and the payer must deduct tax at the rates specified in the certificate until it is cancelled. The Board may make rules specifying cases, conditions and procedures for such applications and certificates.