sule 6666. (1) Every registered person required to deduct tax at source under section 51 (hereafter in this rule referred to as deductor) shall furnish a return in FORM GSTR-7 4[, on or before the tenth66.13 Re-examination of maintenance personnel licences and certificates The Director may re-examine orally, in writing, or both, the holder of a licence, rating or certificate issued under Part