(1) This section shall apply where -

(a) a lump sum is paid to an employee under section 19, whether in respect of dismissal, lay-off or short-time,

(b) the contract of employment under which he was employed (in this section referred to as the previous contract) is renewed, whether by the same or another employer, or he is re-engaged under a new contract of employment, whether by the same or another employer, and

(c) the circumstances of the renewal or re-engagement are such that, in determining for the purposes of section 7(1) or Schedule 3 whether at any subsequent time he has been continuously employed for the requisite period, or for what period he has been continuously employed, the continuity of his period of employment would, apart from this section, be treated as not having been broken by the termination of the previous contract and the renewal or re-engagement.