24. If a person who leaves the employment of a Scottish local authority enters the employment of an English local authority and then or subsequently becomes an English contributory employee, whether by virtue of the English Act or of that Act and these Regulations, in such circumstances that had he become a Scottish contributory employee he would have been entitled to the benefit of Section 15 of the Scottish Act in regard to the reckoning of such service as is mentioned in that section, Article 19 of these Regulations shall apply to him in respect of that service as it applies to an English contributory employee to whom Article 15 of these Regulations applies.