Paragraph 16
(1)
Except where paragraph 15 applies, the person who makes an election under paragraph 1 or 8 must pay family benefit contributions to the Secretary of State by way of a lump sum calculated in accordance with the Method 2 formula in sub-paragraph (2) within 3 months of receiving written notice of the amount of the lump sum.
(2)
The Method 2 formula is A × B × C,
where—
A is the multiplier determined from time to time by the Secretary of State (after taking advice from the scheme actuary) for the purpose of this Part for a person of the same sex as the qualifying person's beneficiary (as defined in paragraph 9),
B is the period (in years) specified under paragraph 10, and
C is the annual rate of the qualifying person's contributable salary.