Repackers shall be exempt from those requirements of this part, including reporting requirements, with respect to packed dates which had been certified for handling, pursuant to § 987.41(a), prior to receipt, except that: (a) A repacker who processes such dates by machine pitting shall comply with the grade, size, inspection, certification, and identification requirements, and (b) a repacker who repackages such dates in containers other than those in which received, shall comply with the then effective container regulations established pursuant to § 987.48.