If before all the contributions payable under paragraph 1 or 2 have been paid the person ceases to be in full-time pensionable employment or dies in such employment, paragraphs 5 to 8 of Schedule 4 (election to pay a lump sum etc.) and paragraphs 1 and 2 of Schedule 7 (reckonable service) apply as if the contributions had been payable under regulation C3, but with the substitution for Table 2 in paragraph 5(5) of Schedule 4 of the Table below.