12.—(1) On the death of a person mentioned in regulation 7 a lump sum of one half of his average remuneration—
(a)shall be payable to the widow or widower to whom an allowance in respect of the deceased is payable under regulation 8;
(b)if not payable under (a), shall be payable to the child of the deceased or of his spouse, to whom an allowance in respect of the deceased is payable under regulation 9 or 10(1)(b) and (3);
(c)if not payable under (a) or (b), shall be payable to a dependent relative, to whom an allowance in respect of the deceased is payable under regulation 10(1)(a) and (2); or
(d)if not payable under (a), (b) or (c), shall be payable to any other or among any other children to whom an allowance in respect of the deceased is payable under regulation 9 or 10(1)(b) and (3):
Provided that a lump sum shall not be paid under this regulation if a lump sum has been paid to the deceased under regulation 4(9) in respect of the same injury or disease.
(2) The provisions of regulations 9(7) or 10(5), as the case may be, shall apply in respect of a payment under paragraph (1)(b), (c) or (d).