a pensionable officer after suffering any attributable loss enters any new employment referred to in regulation 26 or becomes entitled to any pension on ceasing to hold any such employment, or

a person entitled to long-term compensation enters employment the remuneration whereof is payable out of public funds or by any nationalised transport body or subsidiary thereof, or ceases to hold such employment, or receives any increase in his remuneration in such employment, or

a person entitled to retirement compensation enters employment in which the compensation is subject to reduction or suspension under regulation 32, or ceases to hold such employment, or receives any increase in his remuneration in such employment, or

a person entitled to long-term compensation starts to receive any benefit, any increase in benefit or any further benefit under any Act relating to National Insurance,